NTM3B_supp_C12直角坐標幾何

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12 直角坐標幾何 12.1 12 直角坐標幾何 【本章各練習均中英對照,以供參考。】 熱身練習 1. 求下列各直角三角形的未知數。 ( 如有需 要,答案以根式表示。 ) 1. Find the unknown in each of the following right-angled triangles. (Leave your answers in surd form if necessary.) (a) C A 6 cm B x cm 8 cm (b) C 28 m A 14 m B y m (c) 5 m B A C z m z m 2. 求下列各梯形中的未知量。 2. Find the unknowns in each of the following trapeziums. (a) D 120 C A B 78 x y (b) 75 x 82 y C B A D (c) A 107 x y x 1 B C D 3. 求下列各平行四邊形中的未知數。 3. Find the unknowns in each of the following parallelograms. (a) C 8 cm D B y cm A x cm 5 cm (b) Q (2 y 3) cm P S R 10 cm 4 cm ( x 2) cm (c) W T x cm 5 cm X Y Z 3 cm y cm
12.2 數學新里程 中三下 初中附加練習 4. 求下列各長方形中的 x y 4. Find x and y in each of the following rectangles. (a) B 12 cm ( y 2) cm A C D 6 cm 4 x cm (b) y 50 D C A B x 35 (c) A 5 cm y cm x cm B C D 5. 求下列各菱形中的未知數。 5. Find the unknown in each of the following rhombuses. (a) C 3 cm B A D 5 cm x cm (b) 8 cm y cm A B C D 15 cm (c) z cm B C A D 24 cm 10 cm 強化練習 【本部分為書中每個練習額外提供兩種不同的題目組合:「初級組合」和「高級組合」。同學可按其需要選擇完 其中一組 題目。】 練習 12A 【本練習中,如有需要,答案以根式表示。】  程度一 1. 試把下列各組 A B 的坐標與其對應的 距離連接起來。 1. Match the coordinates of A and B with their corresponding distances. A B 的坐標 Coordinates of A and B AB 的距離 Distance of AB A (0, 0), B (3, 2) 45 A (4, 3), B (1, 3) 104 A ( 5, 2), B (5, 4) 34 A ( 1, 5), B ( 4, 10) 13 練習 12A 級組合
練習 12A 級組合 12 直角坐標幾何 12.3 2. 求下列各題中 P Q 的距離。 (a) P (0, 0), Q (4, 2) (b) P (5, 4), Q (2, 2) (c) P (3, 3), Q (7, 7) (d) P (5, 2), Q (3, 6) 2. Find the distance between P and Q in each of the following. (a) P (0, 0), Q (4, 2) (b) P (5, 4), Q (2, 2) (c) P (3, 3), Q (7, 7) (d) P (5, 2), Q (3, 6) 3. 求下列各題中 E F 的距離。 (a) E ( 4, 5), F (3, 2) (b) E (2, 1), F (4, 5) (c) E ( 8, 4), F ( 6, 3) (d) E ( 5, 4), F (2, 3) 3. Find the distance between E and F in each of the following. (a) E ( 4, 5), F (3, 2) (b) E (2, 1), F (4, 5) (c) E ( 8, 4), F ( 6, 3) (d) E ( 5, 4), F (2, 3) 4. 已知 A (0, 0) B (1, 1) C (4, 2) ABC 的頂點。求 ABC 的周界。 4. Given that A (0, 0), B (1, 1) and C (4, 2) are the vertices of ABC , find the perimeter of ABC . 程度二 5. 已知 ABC 的頂點為 A (2, 2) B (2, 4) C (5, 3) 。求 ABC 的面積。 5. Given that the vertices of ABC are A (2, 2), B (2, 4) and C (5, 3), find the area of ABC . 6. 下圖中, PQR 的頂點為 P (4, 2) Q (3, 6) R ( 8, 1) 6. In the figure, the vertices of PQR are P (4, 2), Q (3, 6) and R ( 8, 1). Q (3, 6) x y P (4, 2) R ( 8, 1) O (a) 求證 PQ PR (b) PRQ ( 答案準確至 3 位有效數 字。 ) (a) Prove that PQ PR . (b) Find PRQ . (Correct your answer to 3 significant figures.)  練習 12A 級組合
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12.4 數學新里程 中三下 初中附加練習 程度一 1. 求下列各題中 A B 的距離。 (a) A (3, 4), B (5, 7) (b) A (9, 3), B (10, 5) (c) A (4, 1), B (2, 5) (d) A (10, 12), B (6, 15) 1. Find the distance between A and B in each of the following. (a) A (3, 4), B (5, 7) (b) A (9, 3), B (10, 5) (c) A (4, 1), B (2, 5) (d) A (10, 12), B (6, 15) 2. 已知 A (0, 0) B (3, 4) C (5, 7) ABC 的頂點。求 ABC 的周界。 2. Given that A (0, 0), B (3, 4) and C (5, 7) are the vertices of ABC , find the perimeter of ABC . 3. 已知四邊形 ABCD 的頂點為 A ( 2, 3) ) 4 , 2 1 3 ( B C (5, 2) ) 5 , 2 1 ( D ABCD 的周界。 3. Given that the vertices of quadrilateral ABCD are A ( 2, 3), , ) 4 , 2 1 3 ( B C (5, 2) and , ) 5 , 2 1 ( D find the perimeter of ABCD . 程度二 4. C x 軸上的一點。若 A (2, 1) B ( 4, 5) C 的距離相等,求 C 的坐標。 4. C is a point on the x -axis. If the respective distances from A (2, 1) and B ( 4, 5) to C are equal, find the coordinates of C . 5. 下圖中, ABC 的頂點為 A (11, 2) B (2, 0) C (3, 4) 5. In the figure, the vertices of ABC are A (11, 2), B (2, 0) and C (3, 4). O y x B (2, 0) C (3, 4) A (11, 2) (a) 求證 AC BC (b) 由此,求 BAC ( 答案準確至 3 位有 效數字。 ) (a) Prove that AC BC . (b) Hence find BAC . (Correct your answer to 3 significant figures.)
練習 12A 級組合 練習 12B 級組合 12 直角坐標幾何 12.5 6. 已知四點 A (1, 6) B ( 7, 5) C ( 3, 2) D (3, 0) (a) 求證 ABCD 是一個鳶形。 (b) 求證 AC BD (c) 由此,求 ABCD 的面積。 6. Given four points A (1, 6), B ( 7, 5), C ( 3, 2) and D (3, 0), (a) prove that ABCD is a kite. (b) prove that AC BD . (c) Hence find the area of ABCD . 練習 12B  程度一 1. 試把下列各組 A B 的坐標與其對應的 斜率連接起來。 1. Match the following coordinates of A and B with their corresponding slopes. A B 的坐標 Coordinates of A and B AB 的斜率 Slope of AB A (4, 2), B (2, 3) 3 A ( 5, 3), B ( 4, 6) 6 1 A (0, 0), B (3, 5) 3 5 A ( 2, 3), B (4, 2) 2 1 2. 求下列各題中穿過已知兩點的直線之斜 率。 2. Find the slope of the straight line passing through each of the following pairs of points. (a) O A (1, 1) B (3, 3) x y (b) A (2, 1) B (4, 4) y x O (c) A ( 1, 2) B (4, 3) y x O
12.6 數學新里程 中三下 初中附加練習 3. 求下列各題中穿過已知兩點的直線之斜 率。 3. Find the slope of the straight line passing through each of the following pairs of points. (a) O B ( 5, 3) y x A (0, 0) (b) O y x A ( 2, 3) B (5, 2) (c) O y x A ( 4, 0) B (3, 5) 4. 以下是線段 AB CD EF GH 各端點的 坐標。試把各線段按斜率由大至小排列。 AB : A (1, 2), B (3, 5) CD : C ( 3, 4), D ( 6, 1) EF : E (6, 1), F (8, 9) GH : G (4, 6), H ( 2, 6) 4. The following are the coordinates of vertices of line segments of AB , CD , EF and GH . Arrange the line segments under the descending order of their slopes. AB : A (1, 2), B (3, 5) CD : C ( 3, 4), D ( 6, 1) EF : E (6, 1), F (8, 9) GH : G (4, 6), H ( 2, 6) 5. 已知穿過 A (3, 1) B (4, y ) 的直線之斜率 2 ,求 y 的值。 5. Given that the slope of the straight line passing through A (3, 1) and B (4, y ) is 2, find the value of y . 6. P ( 2, 10) Q (0, 4) R ( a , 2) 三點共 線,求 a 的值。 6. If three points P ( 2, 10), Q (0, 4) and R ( a , 2) are collinear, find the value of a . 程度二 7. 已知穿過 A ( a , 3) B (2 a , 3) 的直線之斜 率為 2 1 ,求 a 的值。 7. Given that the slope of the straight line passing through A ( a , 3) and B (2 a , 3) is 2 1 , find the value of a . 練習 12B 級組合
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練習 12B 級組合 練習 12B 級組合 12 直角坐標幾何 12.7 8. 已知三點 A ( 3, 4) B (5, 2) P (3, k ) 。若 BP 的斜率等於 AB AP 的斜率之積,求 k 的值。 8. For three points A ( 3, 4), B (5, 2) and P (3, k ), if the slope of BP is equal to the product of the slopes of AB and AP , find the value of k . O y x A ( 3, 4) B (5, 2) P (3, k )  程度一 1. 求下列各題中穿過已知兩點的直線之斜 率。 1. Find the slope of the straight line passing through each of the following pairs of points. (a) O y x A ( 2, 3) B (4, 5) (b) O y x A ( 2, 0) B (4, 3) (c) O y x A ( 3, 1) B (5, 4) (d) O y x A (1, 9) B (3, 4) (e) O y x A (2, 4) B (4, 2) (f) B (3, 1) O y x A ( 4, 2)
12.8 數學新里程 中三下 初中附加練習 2. 求下列各題中穿過 A B 的直線之斜率。 (a) A (3, 4), B (5, 6) (b) A (2, 3), B ( 4, 5) (c) A ( 3, 1), B (6, 2) (d) A ( 2, 1), B ( 4, 3) (e) A (0, 3), B ( 7, 2) (f) A ( 5, 2), B (3, 0) (g) A ( 4, 1), B ( 3 2 , 2) (h) A ( 1, 2), B ( 2 1 , 3 2 ) 2. Find the slope of the straight line passing through each of the following pairs of points A and B . (a) A (3, 4), B (5, 6) (b) A (2, 3), B ( 4, 5) (c) A ( 3, 1), B (6, 2) (d) A ( 2, 1), B ( 4, 3) (e) A (0, 3), B ( 7, 2) (f) A ( 5, 2), B (3, 0) (g) A ( 4, 1), B ( 3 2 , 2) (h) A ( 1, 2), B ( 2 1 , 3 2 ) 3. 以下是線段 AB CD EF GH 各端點的 坐標。試把各線段按斜率由小至大排列。 AB : A (0, 5), B (5, 0) CD : C (0, 3), D (5, 1) EF : E (1, 9), F (3, 4) GH : G (2, 4), H (3, 1) 3. The following are the coordinates of the vertices of line segments AB , CD , EF and GH . Arrange the line segments under the ascending order of their slopes. AB : A (0, 5), B (5, 0) CD : C (0, 3), D (5, 1) EF : E (1, 9), F (3, 4) GH : G (2, 4), H (3, 1) 4. 求證下列各點共線。 (a) A ( 3, 2), B (0, 2), C (4, 2) (b) D ( 3, 4), E ( 3, 0), F ( 3, 5) (c) L (1, 1), M (2, 2), N ( 7, 7) (d) P (0, 3), Q (1, 1), R (3, 3) 4. Prove that each of the following sets of points are collinear. (a) A ( 3, 2), B (0, 2), C (4, 2) (b) D ( 3, 4), E ( 3, 0), F ( 3, 5) (c) L (1, 1), M (2, 2), N ( 7, 7) (d) P (0, 3), Q (1, 1), R (3, 3) 5. 已知穿過 A (2, 4) B (5, a ) 的直線之斜率 1 ,求 a 的值。 5. Given that the slope of the straight line passing through A (2, 4) and B (5, a ) is 1, find the value of a . 練習 12B 級組合
練習 12B 級組合 12 直角坐標幾何 12.9 程度二 6. 已知穿過 ) 3 4 , 0 ( A B (2, 2) 的直線之斜 率等於穿過 M ( 4, 8) ) 3 1 , ( x N 的直 線之斜率。求 x 的值。 6. Given that the slope of the straight line passing through ) 3 4 , 0 ( A and B (2, 2) is equal to the slope of the straight line passing through M ( 4, 8) and ) 3 1 , ( x N , find the value of x . 7. 已知三點 A ( 3, 4) B (5, 2) P (3, k ) 。若 AB 的斜率等於 AP BP 的斜率之和,求 k 的值。 7. For three points A ( 3, 4), B (5, 2) and P (3, k ), if the slope of AB is equal to the sum of the slopes of AP and BP , find the value of k . O y x A ( 3, 4) B (5, 2) P (3, k ) 8. 已 知 直 線 L 是 方 程 3 x 4 y 6 0 的 圖 像。 (a) ( a , 3) ( 6, b ) L 上 的 點 ,求 a b 的值。 (b) 由此,求 L 的斜率。 8. The straight line L is the graph of the equation 3 x 4 y 6 0. (a) If ( a , 3) and ( 6, b ) are points on L , find the values of a and b . (b) Hence find the slope of L . 9. 已知 A ( a , b ) 在方程 y 3 x 5 的圖像上。 (a) 試以 a 表示 b (b) 由此,以 a 表示 A 的坐標。 (c) A 是方程 y 3 x 5 的圖像與穿過 P (13, 12) Q ( 7, 4) 的 直 線 之 交 點,試利用 (b) 小題的結果,求 A 坐標。 9. It is given that A ( a , b ) is a point on the graph of the equation y 3 x 5. (a) Express b in terms of a . (b) Hence express the coordinates of A in terms of a . (c) If A is the point of intersection of the graph of the equation y 3 x 5 and the straight line passing through P (13, 12) and Q ( 7, 4), find the coordinates of A by using the result of (b) . 練習 12C
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練習 12C 級組合 12.10 數學新里程 中三下 初中附加練習  程度一 1. 下列各直線中,哪對是平行線? 1. Which of the following straight lines are a pair of parallel lines? 直線 Straight line 斜率 Slope L 1 2 L 2 3 L 3 1 L 4 2 L 5 2 2. 在下列各直線中,哪些是平行線? 2. Which of the following straight lines are parallel lines? 直線 Straight line 直線上的點 Points on straight line L 1 (2, 2), (4, 4) L 2 (1, 0), (2, 1) L 3 (4, 2), (2, 4) L 4 (3, 1), ( 3, 1) L 5 (5, 6), (6, 7) 3. 已知 A ( 3, 2) B ( 4, 5) C (6, 5) D (7, 8) 四點。求證 AD  BC 3. Given four points A ( 3, 2), B ( 4, 5), C (6, 5) and D (7, 8), prove that AD  BC . 4. 已知直線 L 1 的斜率是 4 ,而直線 L 2 穿 A ( 2, 3) B ( 3, 7) 。求證 L 1  L 2 4. Given that the slope of straight line L 1 is 4, and straight line L 2 passes through A ( 2, 3) and B ( 3, 7), prove that L 1  L 2 . 5. 已知 L 1 L 2 是兩條平行線。若 L 2 的斜 率 是 2 , 而 直 線 L 1 穿 過 P (4, 9) Q (1, b ) ,求 b 的值。 5. Given that L 1 and L 2 are two parallel lines, if the slope of L 2 is 2, and straight line L 1 passes through P (4, 9) and Q (1, b ), find the value of b . 程度二 練習 12C 級組合
練習 12C 級組合 12 直角坐標幾何 12.11 6. 已知 L 1 L 2 是兩條平行線。若 L 1 的斜率 k ,而直線 L 2 穿過 A (3, 2 k 11) B (5, 9) ,求 k 的值。 6. Given that L 1 and L 2 are two parallel lines, if the slope of L 1 is k , and straight line L 2 passes through A (3, 2 k 11) and B (5, 9), find the value of k . 7. 若穿過 A ( 2, 3) B ( a , 4) 的直線與穿過 C (6, 3) D ( 5, 10) 的直線互相平行, a 的值。 7. If the straight line passing through A ( 2, 3) and B ( a , 4) is parallel to the straight line passing through C (6, 3) and D ( 5, 10) , find the value of a . 8. (a) 已知四邊形的頂點為 A (4, 2) B (0, 1) C ( 3, 0) D (1, 3) 。求該四邊形 四條邊的斜率。 (b) 問該四邊形是哪一類四邊形? 8. (a) Given that the vertices of a quadrilateral are A (4, 2), B (0, 1), C ( 3, 0) and D (1, 3), find the slopes of the four sides of the quadrilateral. (b) What kind of quadrilateral is it?  程度一 1. 下列各直線中,哪對是平行線? 1. Which of the following straight lines are a pair of parallel lines? 直線 Straight line 直線上的點 Points on straight line L 1 (2, 3), (4, 5) L 2 (0, 3), (1, 4) L 3 (0, 2), (2, 4) L 4 ( 4, 3), ( 2, 5) L 5 ( 7, 2), (3, 4) 2. 已知 ) 2 , 2 1 ( A B (1, 1) ) 2 1 , 1 ( C ) 2 3 , 2 1 ( D 四點。求證 AB  CD 2. Given four points , ) 2 , 2 1 ( A B (1, 1), ) 2 1 , 1 ( C and ) 2 3 , 2 1 ( D , prove that AB  CD .
12.12 數學新里程 中三下 初中附加練習 3. 已知直線 L 1 的斜率是 3 2 ,而直線 L 2 穿 A (0, 3) B (3, 5) 。求證 L 1  L 2 3. Given that the slope of straight line L 1 is 3 2 , and straight line L 2 passes through A (0, 3) and B (3, 5) , prove that L 1  L 2 . 4. 若 穿 過 A (4, b ) B (3, 2) 的 直 線 與 穿 過 C ( 1, 2) D (3, 5) 的直線互相平行,求 b 的值。 4. If the straight line passing through A (4, b ) and B (3, 2) is parallel to the straight line passing through C ( 1, 2) and D (3, 5) , find the value of b . 程度二 5. 已知 A (3, 5) B ( 3, 2) C (4, 1) D ( a , b ) 四點。若 ABCD 是平行四邊形,求 D 的坐標。 5. Given four points A (3, 5), B ( 3, 2), C (4, 1) and D ( a , b ), if ABCD is a parallelogram, find the coordinates of D . 6. 已知四邊形的頂點為 ) 7 , 4 1 2 ( P ) 2 , 4 1 2 ( Q R ( 5, 2) S ( 5, 7) (a) 求該四邊形每條邊的斜率。 (b) 求該四邊形每條邊的邊長。 (c) 問該四邊形是哪一類四邊形? 6. It is given that the vertices of a quadrilateral are , ) 7 , 4 1 2 ( P , ) 2 , 4 1 2 ( Q R ( 5, 2) and S ( 5, 7). (a) Find the slope of each side. (b) Find the length of each side. (c) What kind of quadrilateral is it? 7. 已知直線 L 1 L 2 分別是方程 3 x 6 y 0 x 2 y 8 0 的圖像。 (a) (2, a ) ( 4, b ) L 1 上的點,求 a b 的值。 (b) ( p , 4) ( q , 6) L 2 上的點,求 p q 的值。 (c) 由此,求證直線 L 1 L 2 是一組平行 線。 7. It is given that L 1 and L 2 are the graphs of the equations 3 x 6 y 0 and x 2 y 8 0 respectively. (a) If (2, a ) and ( 4, b ) are points on L 1 , find the values of a and b . (b) If ( p , 4) and ( q , 6) are points on L 2 , find the values of p and q . (c) Hence prove that L 1 and L 2 are parallel lines. 練習 12C 級組合
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練習 12C 級組合 練習 12D 級組合 12 直角坐標幾何 12.13 8. 已 知 直 線 L 是 方 程 7 x 6 y 5 0 的 圖 像,且 A ( a , b ) L 上的一點。 (a) 試以 a 表示 A 的坐標。 (b) 已知 B ( 2, 4) C ( 5, 2) D ( 1, 6) 點。若 ABCD 是一個梯形,其中 AB  CD 。試利用 (a) 小題的結果,求 A 坐標。 8. It is given that straight line L is the graph of the equation 7 x 6 y 5 0 and A ( a , b ) is a point on L . (a) Express the coordinates of A in terms of a . (b) Given three points B ( 2, 4), C ( 5, 2) and D ( 1, 6), if ABCD is a trapezium, where AB  CD , find the coordinates of A by using the result of (a) . 練習 12D  程度一 1. 在下列各直線中,哪對是垂直線? 1. Which of the following straight lines are a pair of perpendicular lines? 直線 Straight line 斜率 Slope L 1 3 L 2 4 1 L 3 0 L 4 3 L 5 4 2. 在下列各直線中,哪些是垂直線? 2. Which of the following straight lines are perpendicular lines? 直線 Straight line 直線上的點 Points on straight line L 1 (1, 1), ( 2, 2) L 2 (4, 3), (4, 2) L 3 (3, 4), (1, 6) L 4 (4, 5), ( 2, 5) L 5 (2, 4), (3, 3)
12.14 數學新里程 中三下 初中附加練習 3. 在下列各題中,求垂直於已知兩點連線 的直線之斜率。 (a) A (2, 4), B (3, 6) (b) P (9, 7), Q ( 4, 3) 3. In each of the following, find the slope of a straight line perpendicular to the straight line joining the points. (a) A (2, 4), B (3, 6) (b) P (9, 7), Q ( 4, 3) 4. 已知 A (2, 4) B (3, 6) C (7, 5) D (5, 6) 求證 AB CD 4. Given four points A (2, 4), B (3, 6), C (7, 5) and D (5, 6), prove that AB CD . 5. A ( 16, 2) B (2, 1) C (4, 11) 分別為 ABC 的頂點,求證 ABC 是直角三角形。 5. If A ( 16, 2), B (2, 1) and C (4, 11) are the vertices of ABC , prove that ABC is a right-angled triangle. 6. 已知直線 L 1 L 2 互相垂直。若 L 1 率是 3 L 2 穿過 A ( a , 5) B (14, 1) a 的值。 6. Given that straight lines L 1 and L 2 are perpendicular to each other, if the slope of L 1 is 3 and L 2 passes through A ( a , 5) and B (14, 1), find the value of a . 7. 已知直線 L 1 L 2 互相垂直。若 L 1 的斜率 k L 2 穿過 P (6, 1) Q (2 k , 6) ,求 k 的值。 7. Given that straight lines L 1 and L 2 are perpendicular to each other, if the slope of L 1 is k and L 2 passes through P (6, 1) and Q (2 k , 6), find the value of k . 8. 下圖中, AB CD 8. In the figure, AB C D. O y x A (1, 10) B ( 4, 10) C ( 6, 4) D ( h , 1) (a) CD 的斜率。 (b) h 的值。 (a) Find the slope of CD . (b) Find the value of h . 練習 12D 級組合
練習 12D 級組合 練習 12D 級組合 12 直角坐標幾何 12.15 程度二 9. 下 圖 中 , 直 線 L 1 L 2 垂 直 交 於 A (3, 7) ,而 L 1 L 2 x 軸分別相交於 B 點和 C 點。若 C 的坐標是 (10, 0) 9. In the figure, straight lines L 1 and L 2 intersect perpendicularly at A (3, 7), and L 1 and L 2 intersect the x -axis at B and C respectively. If the coordinates of C are (10, 0), O y x A (3, 7) C (10, 0) B L 1 L 2 (a) B 的坐標。 (b) 由此,求 ABC 的面積。 (a) find the coordinates of B . (b) hence find the area of ABC . 10. 已知 A ( a , b ) B (9, 4) C (6, 2) 滿足以下 條件︰ 條件 I AB 的斜率 11 2 條件 II AC BC (a) 試根據條件 I ,以 b 表示 a (b) 試根據條件 II ,以 b 表示 a (c) 由此,求 A 的坐標。 10. It is known that A ( a , b ), B (9, 4) and C (6, 2) satisfy the following conditions: Condition I: Slope of AB 11 2 Condition II: AC BC (a) According to condition I, express a in terms of b . (b) According to condition II, express a in terms of b . (c) Hence find the coordinates of A .  程度一 1. 求垂直於已知兩點連線的直線之斜率。 (a) A (1, 4), B (9, 7) (b) ) 3 2 2 , 3 1 ( ), 2 , 3 1 1 ( Q P 1. Find the slope of a straight line perpendicular to the straight line joining each of the following pairs of points. (a) A (1, 4), B (9, 7) (b) ) 3 2 2 , 3 1 ( ), 2 , 3 1 1 ( Q P
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12.16 數學新里程 中三下 初中附加練習 2. 已知 A (5, 0) B (4, 3) C ( 2, 6) D ( 5, 5) 。求證 AB CD 2. Given four points A (5, 0), B (4, 3), C ( 2, 6) and D ( 5, 5), prove that AB CD . 3. 已知 A ( 4, 5) B ( 6, 2) C ( 2 1 , 2 1 ) D (4, 2 1 ) 。問線段 AB BC CD AD 哪一組互相垂直? 3. Given four points A ( 4, 5), B ( 6, 2), C ( 2 1 , 2 1 ) and D (4, 2 1 ), which pair of line segments among AB , BC , CD and AD are perpendicular to each other? 4. 已知 A (4, 2) B ( 3, 2) C (8, 5) ABC 的頂點。求證 ABC 是直角三角形。 4. Given that A (4, 2), B ( 3, 2) and C (8, 5) are the vertices of ABC , prove that ABC is a right-angled triangle. 5. 若 穿 過 A (5, 2) B ( a , 9) 的 直 線 垂 直 於 斜率為 7 3 的直線,求 a 的值。 5. If the straight line passing through A (5, 2) and B ( a , 9) is perpendicular to a straight line with the slope of 7 3 , find the value of a . 6. 已 知 直 線 L 1 穿 過 A ( 2, 9) B ( 2 1 , 4) , 而 直 線 L 2 穿 過 C (6, 2) D ( 8, h ) 。若 L 1 L 2 ,求 h 的值。 6. Given that straight line L 1 passes through A ( 2, 9) and B ( 2 1 , 4), and straight line L 2 passes through C (6, 2) and D ( 8, h ), find the value of h if L 1 L 2 . 7. 下 圖 中 , 直 線 L 1 L 2 垂 直 交 於 A (4, 7) ,而 L 1 L 2 x 軸分別相交於 B 點和 C 點。若 B 的坐標是 ( 2, 0) 7. In the figure, straight lines L 1 and L 2 intersect perpendicularly at A (4, 7), and L 1 and L 2 intersect the x -axis at B and C respectively. If the coordinates of B are ( 2, 0), O y x L 1 L 2 A (4, 7) B ( 2, 0) C 練習 12D 級組合
練習 12D 級組合 12 直角坐標幾何 12.17 (a) L 1 的斜率。 (b) L 2 的斜率。 (c) C 的坐標。 (d) 由此,求 ABC 的面積。 (a) find the slope of L 1 . (b) find the slope of L 2 . (c) find the coordinates of C . (d) Hence find the area of ABC . 程度二 8. 已 知 A (5, 2) B ( 3, 4) 兩 點 且 C 點 在 y 軸上。若 AB AC ,求 C 的坐標。 8. Given two points A (5, 2) and B ( 3, 4), and C lies on the y -axis, find the coordinates of C if AB AC . 9. 已知 A (3, 8) B ( 21, 19) C ( a , b ) D (9, 5) 四點。若 AC BD AD  BC ,求 C 的坐標。 9. Given four points A (3, 8), B ( 21, 19), C ( a , b ) and D (9, 5), find the coordinates of C if AC BD and AD  BC . 10. 已知直線 L 1 L 2 分別是方程 x 3 y 1 0 6 x 2 y 8 0 的圖像。 (a) (5, a ) ( b , 3) L 1 上的點,求 a b 的值。 (b) ( p , 2) (9, q ) L 2 上的點 ,求 p q 的值。 (c) 由此,求證直線 L 1 L 2 是一組垂直 線。 0 10. It is given that straight lines L 1 and L 2 are the graphs of the equations x 3 y 1 0 and 6 x 2 y 8 0 respectively. (a) If (5, a ) and ( b , 3) are points on L 1 , find the values of a and b . (b) If ( p , 2) and (9, q ) are points on L 2 , find the values of p and q . (c) Hence prove that L 1 and L 2 are perpendicular lines. 11. 已知 A ( a , b ) 在方程 2 x 3 y 10 0 的圖 像上。 (a) 試以 a 表示 A 的坐標。 (b) A ( a , b ) B (2, 12) C ( 6, 2) D ( 1, 2) 組成一個長方形,試利用 (a) 題的結果,求 A 的坐標。 11. It is given that A ( a , b ) is a point on the graph of the equation 2 x 3 y 10 0. (a) Express the coordinates of A in terms of a . (b) If A ( a , b ), B (2, 12), C ( 6, 2) and D ( 1, 2) form a rectangle, find the coordinates of A by using the result of (a) . 練習 12E
12.18 數學新里程 中三下 初中附加練習  程度一 1. 下列各圖中, P 為線段 AB 上的中點,求 P 點的坐標。 1. In each of the following figures, P is the mid-point of line segment AB . Find the coordinates of P . (a) y x A (1, 2) O B (5, 8) P (b) y x A (0, 0) O B (7, 4) P (c) y x B (10, 1) O A ( , 5) P 1 2 2. 下列各圖中, P 為線段 AB 上的中點,求 P 點的坐標。 2. In each of the following figures, P is the mid-point of line segment AB . Find the coordinates of P . (a) y x A ( 10, 4) O P B ( 1, 1) (b) y x A ( 4, 1) P B ( 1, 4) O (c) y x A ( 6, 4) P O B (0, 0) 3. 下列各圖中, P 為線段 AB 上的一點,求 P 點的坐標。 3. In each of the following figures, P is a point on line segment AB . Find the coordinates of P . (a) y x A (1, 1) O B (7, 4) P AP PB 1 2 (b) B ( 2, 1) A ( 10, 5) P y x O AP PB 3 1 (c) B (2, 5) A ( 4, 3) P y x O AP PB 2 3 練習 12E 級組合
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練習 12E 級組合 12 直角坐標幾何 12.19 4. P A ( 12, 4) B (9, 6) 的中點,求 P 點的坐標。 4. If P is the mid-point of A ( 12, 4) and B (9, 6), find the coordinates of P . 5. 已知 A (0, 4) B (3, 5) 兩點。若 P 點以 1 : 2 的比把線段 AB 分成兩部分,求 P 點的 坐標。 5. Given two points A (0, 4) and B (3, 5) , if P divides line segment AB in the ratio of 1 : 2, find the coordinates of P . 6. 已知 P A ( 6, 4) B ( k , 8) 的中點, P x 坐標是 4 ,求 k 的值。 6. Given that P is the mid-point of A ( 6, 4) and B ( k , 8), and the x -coordinate of P is 4, find the value of k . 7. 已 知 P (4, 2) A ( 2, a ) B ( b , 8) 的 中 點,求 a b 的值。 7. Given that P (4, 2) is the mid-point of A ( 2, a ) and B ( b , 8), find the values of a and b . 程度二 8. P (1, 1) A ( a 7, 2 a ) B (4 2 a , b ) 的中點,求 a b 的值。 8. If P (1, 1) is the mid-point of A ( a 7, 2 a ) and B (4 2 a , b ), find the values of a and b . 9. 下圖中, ABCD 是一個長方形。 E AD 的 中點 , F 3 : 2 的 比把 BC 分成 兩部 分。 9. In the figure, ABCD is a rectangle. E is the mid-point of AD . F divides BC in the ratio of 3 : 2. A (14, 16) D ( 12, 6) E y x O F B (19, 3) C ( 7, 7)
練習 12E 級組合 12.20 數學新里程 中三下 初中附加練習 (a) E F 的坐標。 (b) 求四邊形 CDEF 的周界。 ( 答案準確 至小數點後一個位。 ) (a) Find the coordinates of E and F . (b) Find the perimeter of quadrilateral CDEF . (Correct your answer to 1 decimal place.) 10. 下圖中, R 1 : r 的比把線段 PQ 分成兩 部分。 ABR 的面積是 5 個平方單位。 10. In the figure, R divides PQ in the ratio of 1 : r . The area of ABR is 5 square units. P ( 2, 1) R y x O B (3, 0) A ( 1, 0) Q (4, 7) PR RQ 1 r (a) 若以 AB ABR 的底,試 以 r 表 示 ABR 的高度。 (b) 由此,求 r 的值。 (a) If AB is the base of ABR , express the height of ABR in terms of r . (b) Hence find the value of r .  程度一 1. 下列各圖中, P 為線段 AB 上的中點,求 P 點的坐標。 1. In each of the following figures, P is the mid-point of line segment AB . Find the coordinates of P . (a) O P B ( 6, 2) y x A (2, 4) (b) O P B (1, 2) y x A (8, 4) (c) O P B (0, 2) y x A ( 2, 0) 練習 12E 級組合 練習 12E 級組合
12 直角坐標幾何 12.21 2. 下列各圖中, P 為線段 AB 上的一點,求 P 點的坐標。 2. In each of the following figures, P is a point on line segment AB . Find the coordinates of P . (a) O P y x A (1, 1) B (10, 5) AP PB 2 1 (b) O P y x A ( 5, 6) B (4, 2) AP PB 2 3 (c) O P y x A ( 2, 4) B (4, 4) AP PB 1 4 3. 在下列各題中, M A B 的中點。求 M 點的坐標。 (a) A ( 2, 4), B (6, 8) (b) A (5, 3), B (3, 6) (c) A ( 4, 2), B ( 6, 0) (d) ) 2 , 4 1 3 ( ), 5 , 4 1 ( B A 3. In each of the following, M is the mid- point of A and B . Find the coordinates of M . (a) A ( 2, 4), B (6, 8) (b) A (5, 3), B (3, 6) (c) A ( 4, 2), B ( 6, 0) (d) ) 2 , 4 1 3 ( ), 5 , 4 1 ( B A 4. 已 知 ) 6 , 2 1 2 ( A ) 4 , 2 1 4 ( B 點。若 P 點以 1 : 2 的比把線段 AB 分成兩 部分,求 P 點的坐標。 4. Given two points ) 6 , 2 1 2 ( A and ) 4 , 2 1 4 ( B , if P divides line segment AB in the ratio of 1 : 2, find the coordinates of P . 5. P (5, 3) A ( 4, a ) B ( b , 7) 的中點, a b 的值。 5. If P (5, 3) is the mid-point of A ( 4, a ) and B ( b , 7), find the values of a and b . 程度二 6. A (2 a , a 5) B (5 b 1, 4 b 1) 的中點 P ( 3, 7) ,求 a b 的值。 6. If P ( 3, 7) is the mid-point of A (2 a , a 5) and B (5 b 1, 4 b 1), find the values of a and b . 練習 12E 級組合
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練習 12E 級組合 12.22 數學新里程 中三下 初中附加練習 7. 已知 A (7, 3) B ( 7, 10) 兩點。若 C ( k 1, 8) 把線段 AB 1 : r 的比分成兩部分,求 r k 的值。 7. Given two points A (7, 3) and B ( 7, 10), if C ( k 1, 8) divides line segment AB in the ratio of 1 : r , find the values of r and k . 8. 下圖中, E 分別以 2 : 3 的比把線段 AB CD 分成兩部分。 8. In the figure, E divides line segments AB and CD in the ratio of 2 : 3 respectively. O D B ( 2, 8) y x A (3, 2) C (5, 4) E (a) E 的坐標。 (b) D 的坐標。 (c) AC DB 是否平行? (a) Find the coordinates of E . (b) Find the coordinates of D . (c) Are AC and DB parallel lines? 9. 下圖中, C D 是在 x 軸上的點。 A 1 : r 的比把線段 PQ 分成兩部分。 ABCD 正方形,其面積是 9 平方單位。 9. In the figure, C and D are points on the x -axis. A divides line segment PQ in the ratio of 1 : r . ABCD is a square with the area of 9 square units. O Q (7, 5) y x P ( 3, 1) A B C D PA AQ 1 r (a) 試以 r 表示正方形 ABCD 的邊長。 (b) 由此,求 r 的值。 (a) Express the length of each side of square ABCD in terms of r . (b) Hence find the value of r . 10. 下圖中, D E 分別是在 AB AC 上的 點且 DE // BC 10. In the figure, D and E are points on AB and AC respectively, and DE // BC .
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練習 12F 級組合 12 直角坐標幾何 12.23 A (8, 11) B (2, 1) C (20, 5) D (4, a ) E ( b , c ) (a) AD : DB (b) D E 的坐標。 (c) ABC ADE 的面積之比。 (a) Find AD : DB . (b) Find the coordinates of D and E . (c) Find the ratio of the areas of ABC and ADE . 練習 12F  程度一 1. 下圖中, ABC 的頂點為 A (5, 0) B (13, 1) C (5, 3) D E 分別是 AC BC 中點。 1. In the figure, the vertices of ABC are A (5, 0), B (13, 1) and C (5, 3). D and E are the mid-points of AC and BC respectively. B (13, 1) A (5, 0) D y x O C (5, 3) E (a) D E 的坐標。 (b) 求證 DE // AB (a) Find the coordinates of D and E . (b) Prove that DE // AB . 2. 下圖中, OAB 是等腰三角形,其中 OA AB D OB 的中點。 2. In the figure, OAB is an isosceles triangle, where OA AB . D is the mid-point of OB . O y x A (3, 7) D B (a) B D 的坐標。 (b) 由此,求證 AD OB (a) Find the coordinates of B and D . (b) Hence prove that AD OB . 練習 12F 級組合
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練習 12F 級組合 12.24 數學新里程 中三下 初中附加練習 3. 下 圖 中 , D C 分 別 是 OB AB 上 的 點,使 AD OB OC AB 3. In the figure, D and C are the respective points on OB and AB such that AD OB and OC AB . O y x A (2, 8) B (10, 0) D ( a , 0) C (5, b ) (a) C D 的坐標。 (b) 求證 AB OB BD BC (a) Find the coordinates of C and D . (b) Prove that AB OB BD BC . 4. 下 圖 中 , ADC AEB 是 直 線 。 AD AE AB CE AC BD 4. In the figure, ADC and AEB are straight lines. AD AE , AB CE and AC BD . O y x A (0, 100) B (75, 0) D ( a , 72) E (21, b ) C ( 75, 0) (a) D E 的坐標。 (b) 由此,求證 BD CE (a) Find the coordinates of D and E . (b) Hence prove that BD CE . 5. 下圖所示為菱形 OABC P Q 分別是 AB OC 的中點。 5. The figure shows rhombus OABC . P and Q are the mid-points of AB and OC respectively. O y x A (14, 2) B (4, 12) C ( a , 10) Q P (a) C 的坐標。 (b) P Q 的坐標。 (c) 由此,求證 OPBQ 是平行四邊形。 (a) Find the coordinates of C . (b) Find the coordinates of P and Q . (c) Hence prove that OPBQ is a parallelogram.
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12 直角坐標幾何 12.25 6. 下圖中, OAB 是等腰三角形,其中 OA BA C D E 分別是 BO OA AB 的點,其中 OC BE OD BC 6. In the figure, OAB is an isosceles triangle, where OA BA . C , D and E are points on BO , OA and AB respectively, where OC BE and OD BC . O y x A (45, 108) B (90, 0) C (65, 0) E (65, b ) D ( a , ) 300 13 (a) D E 的坐標。 (b) 由此,求證 CDE 是等腰三角形。 (a) Find the coordinates of D and E . (b) Hence prove that CDE is an isosceles triangle. 7. 下 圖 中 , A (4, 5) B ( a , b ) C ( 4, 5) D ( 10, c ) 是一個四邊形的頂點,且 AC BD 互相垂直平分。 7. In the figure, A (4, 5), B ( a , b ), C ( 4, 5) and D ( 10, c ) are the vertices of a quadrilateral, and AC and BD bisect each other perpendicularly. O y x A (4, 5) B ( a , b ) C ( 4, 5) D ( 10, c ) (a) B D 的坐標。 (b) AB BC CD DA 的斜率。 (c) 由此,求證 ABCD 是平行四邊形。 (a) Find the coordinates of B and D . (b) Find the slopes of AB , BC , CD and DA . (c) Hence prove that ABCD is a parallelogram. 程度二 練習 12F 級組合
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練習 12F 級組合 12.26 數學新里程 中三下 初中附加練習 8. 下圖中, A B ( c , d ) C ( a , b ) D ( c , d ) 是一個四邊形的四個頂點。已知 AC BD 互相平分。 8. In the figure, A , B ( c , d ), C ( a , b ) and D ( c , d ) are the vertices of a quadrilateral. AC and BD bisect each other. O y x A B ( c , d ) C ( a , b ) D ( c , d ) (a) 試以 a b 表示 A 的坐標。 (b) 求證 ABCD 是一個平行四邊形。 (a) Express the coordinates of A in terms of a and b . (b) Prove that ABCD is a parallelogram. 9. 下圖中, P Q R 分別是 OA AB OB 的中點。 9. In the figure, P , Q and R are the mid- points of OA , AB and OB respectively. O y x P A ( a , b ) B ( c , d ) R Q (a) P Q R 的坐標。 (b) 由此,求證 OPQR 是平行四邊形。 (a) Find the coordinates of P , Q and R . (b) Hence prove that OPQR is a parallelogram.  程度一
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12 直角坐標幾何 12.27 1. 求證下圖中的 OPQR 是長方形。 1. Prove that OPQR in the following figure is a rectangle. O P ( 3, 3) y x R (4, 4) Q (1, 7) 2. 求證下圖中的 ABCD 是平行四邊形。 2. Prove that ABCD in the following figure is a parallelogram. O y x D (2, 3) B (5, 6) A ( 1, 2) C (8, 1) 3. 下 圖所 示 為 OAD B C OD 上 的 點,其中 AB AC OB CD 3. The figure shows OAD . B and C are points on OD such that AB AC and OB CD . O y x D B (1, 0) A ( a , 12) C (11, 0) (a) A D 的坐標。 (b) 由此,求證 OA DA (a) Find the coordinates of A and D . (b) Hence prove that OA DA . 4. 下圖所示為四邊形 OABC AC BO 相交 D 。已知 AB BC OC OA // CB 4. The figure shows quadrilateral OABC . AC and BO intersect at D . AB BC OC and OA // CB . 練習 12F 級組合
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練習 12F 級組合 12.28 數學新里程 中三下 初中附加練習 O y x B A (11, 0) C (3, 4) D ( a , ) 11 4 (a) B 的坐標。 (b) D 的坐標。 (c) 由 此 , 求 證 OAD 是 一 個 等 腰 三 角 形。 (a) Find the coordinates of B . (b) Find the coordinates of D . (c) Hence prove that OAD is an isosceles triangle. 5. 下 圖 所 示 為 AOG B D AO 上 的 點,而 E AG 上的一點,使 DE // OG BE // DG 5. The figure shows AOG . B and D are points on AO , and E is a point on AG such that DE // OG and BE // DG . O y x G (10, 2) D (0, 4) E (5, a ) B (0, b ) A (0, 8) (a) B E 的坐標。 (b) 求證 AB DO AD BD (a) Find the coordinates of B and E . (b) Prove that AB DO AD BD . 程度二 6. 下 圖 中 , OABC 是 梯 形 , 其 中 AB // OC M N 分別是 OA BC 的中點。 6. In the figure, OABC is a trapezium, where AB // OC . M and N are the mid- points of OA and BC respectively. O y x C ( c , 0) A ( a , d ) B ( b , d ) M N (a) M N 的坐標。 (b) 由此,求證 2 OC AB MN (a) Find the coordinates of M and N . (b) Hence prove that 2 OC AB MN .
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12 直角坐標幾何 12.29 7. 下圖中, OAB OAC 是直角三角形,其 C OB 上的一點。 7. In the figure, OAB and OAC are right- angled triangles, where C is a point on OB . O y x A ( a , b ) C B (a) 試以 a b 表示 B C 的坐標。 (b) 由此,求證 (i) AC 2 OC CB (ii) AB 2 OB BC (iii) OA 2 OC OB (a) Express the coordinates of B and C in terms of a and b . (b) Hence prove that (i) AC 2 OC CB . (ii) AB 2 OB BC . (iii) OA 2 OC OB . 8. 下圖中, A ( a , b ) B ( c , d ) C ( e , f ) D ( g , h ) 是任意一個四邊形的頂點。 P Q R S 分別是 AB BC CD DA 的中點。 8. In the figure, A ( a , b ), B ( c , d ), C ( e , f ) and D ( g , h ) are the vertices of a quadrilateral. P , Q , R and S are the mid- points of AB , BC , CD and DA respectively. O y x A ( a , b ) S R B ( c , d ) C ( e , f ) Q P D ( g , h ) (a) P Q R S 的坐標。 (b) PQ QR RS SP 的斜率。 (c) 由此,求證 PQRS 是平行四邊形。 (a) Find the coordinates of P , Q , R and S . (b) Find the slopes of PQ , QR , RS and SP . (c) Hence prove that PQRS is a parallelogram. 9. 下圖中, OD BC OAB 的中線且相 交於 E OE : ED r : 1 BE : EC m : 1 9. In the figure, OD and BC are the medians of OAB and intersect at E . OE : ED r : 1 and BE : EC m : 1. 練習 12F 級組合
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12.30 數學新里程 中三下 初中附加練習 O y x A (2 a , 2 b ) E B (6 a , 0) D C OE ED r 1 ; BE EC m 1 (a) 試以 a b 表示 C D 的坐標。 (b) 求證 E 的坐標為 ) 1 , 1 4 ( r rb r ra (c) 求證 E 的坐標為 ) 1 , 1 ) 6 ( ( m mb m a m (d) 由此,求證 r m 且求 r m 的值。 (a) Express the coordinates of C and D in terms of a and b . (b) Prove that the coordinates of E are ) 1 , 1 4 ( r rb r ra . (c) Prove that the coordinates of E are ) 1 , 1 ) 6 ( ( m mb m a m . (d) Hence prove that r m and find the values of r and m . 本章測驗 ( 時限: 1 小時 ) 甲部 (1) [ 每題 3 ] 1. A (4, 5) B ( 3, 2) 的距離。 1. Find the distance between two points A (4, 5) and B ( 3, 2) . 2. 求穿過 P (5, 2) Q (3, 4) 的直線之斜率。 2. Find the slope of the straight line passing through P (5, 2) and Q (3, 4) . 3. 求 證 A (3, 2) B (1, 1) C ( 1, 0) 三點 共 線。 3. Prove that three points A (3, 2), B (1, 1) and C ( 1, 0) are collinear. 4. 下圖中, M 平分線段 AB 。求 a 的值。 4. In the figure, M bisects line segment AB . Find the value of a .
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12 直角坐標幾何 12.31 B (10, 13) A ( a , 1) M (3, 6) 5. 下圖中, AP : PB 1 : 2 。求 P 點的坐標。 5. In the figure, AP : PB 1 : 2. Find the coordinates of P . B (13, 2) A (1, 4) P 6. 已知 A ( 2, 4) B ( 9, 3) 兩點, P 為線段 AB 上的一點,且 AP : PB 4 : 3 ,求 P 點的坐標。 6. Given two points A ( 2, 4) and B ( 9, 3) , P is a point on line segment AB , and AP : PB 4 : 3, find the coordinates of P . 甲部 (2) [ 每題 6 ] 7. 已知直線 L 1 的斜率為 3 ,而直線 L 2 穿過 P ( 2, 3) Q (4 b , b ) 。若 L 1 L 2 ,求 b 值。 7. Given that the slope of L 1 is 3, and straight line L 2 passes through P ( 2, 3) and Q (4 b , b ), find the value of b if L 1 L 2 . 8. 已知 H (8, 0) K (12, 4) 兩點。若 I (9, 1) 線 段 HK 上 的 一 點, 且 HI : IK r : 1 r 的值。 8. Given two points H (8, 0) and K (12, 4), if I (9, 1) is a point on line segment HK and HI : IK r : 1, find the value of r . 9. 下圖中, OABC 是一個四邊形。求證該四 邊形的對角線互相平分。 9. In the figure, OABC is a parallelogram. Prove that their diagonals bisect each other.
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12.32 數學新里程 中三下 初中附加練習 B (10, 8) O y x A (2, 7) C (8, 1) 10. 下圖中, D E 分別是 AB AC 上的點。 已知 ADE ABC 的面積之比是 4 : 25 BC  DE 10. In the figure, D and E are points on AB and AC respectively. The ratio of the areas of ADE and ABC is 4 : 25 and BC  DE . B (14, 13) O y x A ( 1, 7) C ( 21, 3) E D (a) AD DB (b) 由此,求 D E 的坐標。 (a) Find AD DB . (b) Hence find the coordinates of D and E . 乙部 11. 下圖所示為長方形 OABC 11. The figure shows rectangle OABC . B O y x A (0, a ) C ( c , 0) K I J H
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12 直角坐標幾何 12.33 (a) B 的坐標。 (1 ) (b) OA AB BC OC 的中點 H I J K 的坐標。 (4 ) (c) 求證 HIJK 是一個菱形。 (8 ) (a) Find the coordinates of B . (1 mark) (b) Find the coordinates of the mid-points H , I , J and K of OA , AB , BC and OC . (4 marks) (c) Prove that HIJK is a rhombus. (8 marks) 多項選擇題 [ 每題 3 ] 12. 問下列何者的距離最長? A. A (0, 1), B (3, 4) B. A (2, 5), B (2, 3) C. A (4, 5), B (6, 5) D. A ( 2, 9), B (3, 1) 12. Which of the following has the longest distance? A. A (0, 1), B (3, 4) B. A (2, 5), B (2, 3) C. A (4, 5), B (6, 5) D. A ( 2, 9), B (3, 1) 13. 若穿過 A (0, 0) B ( k , 3) 的直線之斜率為 2 ,求 k 的值。 A. 1 B. 1.5 C. 2 D. 3 13. If the slope of the straight line passing through A (0, 0) and B ( k , 3) is 2, find the value of k . A. 1 B. 1.5 C. 2 D. 3 14. A (1, 4 1 ) B (0, 2 1 ) C ( a , 1) 三點 共線,求 a 的值。 A. 1 B. 2 C. 2 1 2 D. 3 14. If three points A (1, 4 1 ), B (0, 2 1 ) and C ( a , 1) are collinear, find the value of a . A. 1 B. 2 C. 2 1 2 D. 3
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12.34 數學新里程 中三下 初中附加練習 15. 已知直線 L 1 的斜率是 2 1 ,而直線 L 2 穿 P Q 。若 L 1 L 2 ,問下列哪組是 P Q 的可能坐標? A. P (1, 1), Q (0, 1) B. P (7, 4), Q ( 5, 2) C. P (0, 3), Q (1, 5) D. P ( 5, 2), Q ( 4 , 4 1 ) 15. It is given that the slope of straight line L 1 is 2 1 and straight line L 2 passes through P and Q . If L 1 L 2 , which of the following are possible coordinates of P and Q ? A. P (1, 1), Q (0, 1) B. P (7, 4), Q ( 5, 2) C. P (0, 3), Q (1, 5) D. P ( 5, 2), Q ( 4 , 4 1 ) 16. 問下列何者不能組成三角形? A. (1, 3), ( 4, 5), ( 9, 7) B. ( 1, 4), (7, 8), (3, 7) C. (6, 5), ( 2, 8), (6, 3) D. (4, 4), ( 5, 5), ( 1, 2) 16. Which of the following cannot form a triangle? A. (1, 3), ( 4, 5), ( 9, 7) B. ( 1, 4), (7, 8), (3, 7) C. (6, 5), ( 2, 8), (6, 3) D. (4, 4), ( 5, 5), ( 1, 2) 17. P A ( 3, 4) B (7, 6) 的 中 點 , 求 P 點的坐標。 A. (5, 2) B. (2, 5) C. ( 1, 5) D. ( 5, 1) 17. If P is the mid-point of A ( 3, 4) and B (7, 6), find the coordinates of P . A. (5, 2) B. (2, 5) C. ( 1, 5) D. ( 5, 1) 18. 已知 A (4, 2) B (8, 6) 兩點。若 P 點以 1 : 3 的比把線段 AB 分成兩部分,求 P 的坐標。 A. (0, 5) B. (2, 2) C. (5, 3) D. (6, 4) 18. Given two points A (4, 2) and B (8, 6), if P divides line segment AB in the ratio of 1 : 3, find the coordinates of P . A. (0, 5) B. (2, 2) C. (5, 3) D. (6, 4)
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12 直角坐標幾何 12.35 19. P (2, 8) A ( a , b ) B ( 4, 6) 的 中 點 , a b 的值。 A. 18 B. 4 C. 2 D. 2 19. If P (2, 8) is the mid-point of A ( a , b ) and B ( 4, 6), find the value of a b . A. 18 B. 4 C. 2 D. 2 20. 已知 A (2, 5) B ( c , 2) 兩點。若 P ( 1, 3) 2 : 1 的比把線段 AB 分成兩部分,求 c 值。 A. 9 B. 4 C. 2.5 D. 0 20. Given two points A (2, 5) and B ( c , 2), if P ( 1, 3) divides line segment AB in the ratio of 2 : 1, find the value of c . A. 9 B. 4 C. 2.5 D. 0 21. 下圖中, P Q R 為線段 AB 上的點,求 P 點的坐標。 21. In the figure, P , Q and R are points on line segment AB . Find the coordinates of P . B ( 5, 7) O y x A (0, 2) P Q R A. ) 3 23 , 5 ( B. ) 3 14 , 5 ( C. ) 4 23 , 4 15 ( D. ) 5 , 3 14 ( A. ) 3 23 , 5 ( B. ) 3 14 , 5 ( C. ) 4 23 , 4 15 ( D. ) 5 , 3 14 (
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12.36 數學新里程 中三下 初中附加練習 22. 求下圖中 AB : CD 的比。 22. Find the ratio of AB : CD in the following figure. A ( 5, 9) O y x D (15, 3) C B A. 1 : 1 B. 1 : 2 C. 2 : 1 D. 3 : 1 A. 1 : 1 B. 1 : 2 C. 2 : 1 D. 3 : 1 23. ABC DEF 是直角坐標平面上的三 角形且 ABC DEF 。問下列何者必然 正確? I. A B 的距離相等於 D E 的距離。 II. AB 的斜率相等於 DE 的斜率。 A. 只有 I B. 只有 II C. 全部皆是 D. 全部皆不是 23. ABC and DEF are triangles on a rectangular coordinate plane and ABC DEF . Which of the following must be correct? I. The distance between A and B is equal to the distance between D and E . II. The slope of AB is equal to the slope of DE . A. I only B. II only C. All of them D. None of them
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12 直角坐標幾何 12.37 24. A B C 是直角坐標平面上的三點。問下 列何者必不正確? I. m AC m BC m AB II. m AC m BC m AB III. AC BC AB A. 只有 I B. 只有 III C. 只有 I II D. 全部皆是 24. A , B and C are three points on a rectangular coordinate plane. Which of the following must be incorrect? I. m AC m BC m AB II. m AC m BC m AB III. AC BC AB A. I only B. III only C. I and II only D. All of them 25. 已知 P ( 1, 3) Q (5, 1) R (7, 5) S (3, 9) 四點。問下列何者正確? I. 四 邊 形 PQRS 的對 角 線 互相 垂直 平 分。 II. 四邊形 PQRS 的四邊相等。 III. 四邊形 PQRS 的對邊平行。 A. 只有 I B. 只有 I II C. 只有 II III D. 全部不正確 25. Given four points P ( 1, 3), Q (5, 1), R (7, 5) and S (3, 9), which of the following is/are correct? I. Diagonals of quadrilateral PQRS bisect each other perpendicularly. II. All the sides of quadrilateral PQRS are equal in length. III. The opposite sides of quadrilateral PQRS are parallel. A. I only B. I and II only C. II and III only D. None of them 26. 下 圖 中 , 四 邊 形 ABCD 的 頂 點 分 別 是 A ( 2, 4) B (1, 1) C (6, 2) D (3, 3) 。問 下列何者正確? 26. In the figure, the vertices of quadrilateral ABCD are A ( 2, 4), B (1, 1), C (6, 2) and D (3, 3). Which of the following is/are correct? D (3, 3) O y x A ( 2, 4) C (6, 2) B (1, 1)
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12.38 數學新里程 中三下 初中附加練習 I. 對角線 AC 的中點坐標是 (2, 1) II. 對角線 BD 的中點坐標是 (2, 1) III. 線段 BC 的斜率和線段 AD 的斜率相 等。 IV. 四邊形 ABCD 的所有邊長相等。 A. 只有 I B. 只有 II C. 只有 II III D. 只有 III IV I. The coordinates of the mid-point of diagonal AC are (2, 1). II. The coordinates of the mid-point of diagonal BD are (2, 1). III. The slopes of line segments BC and AD are equal. IV. All the sides of quadrilateral ABCD are equal in length. A. I only B. II only C. II and III only D. III and IV only
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