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Math Geometry Elementary Geometry for College Students

In Exercises 11 and 12, make drawings as needed. Suppose that T is a point on side P Q ¯ of Δ P Q R . Also, R T ¯ bisects ∠ P R Q , and ∠ P ≅ ∠ Q . If ∠ 1 and ∠ 2 are the angles formed when R T ¯ intersects P Q ¯ , explain why ∠ 1 ≅ ∠ 2 .

In Exercises 11 and 12, make drawings as needed. Suppose that T is a point on side P Q ¯ of Δ P Q R . Also, R T ¯ bisects ∠ P R Q , and ∠ P ≅ ∠ Q . If ∠ 1 and ∠ 2 are the angles formed when R T ¯ intersects P Q ¯ , explain why ∠ 1 ≅ ∠ 2 .

Solution Summary: The author explains that angle 1 is congruent to the sum of the measures of interior angles in a triangle.

Elementary Geometry for College Students

Elementary Geometry for College Students

6th Edition

ISBN: 9781285195698

Author: Daniel C. Alexander, Geralyn M. Koeberlein

Publisher: Cengage Learning

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Textbook Question

Chapter 2.4, Problem 12E

In Exercises 11 and 12, make drawings as needed.

Suppose that T is a point on side P Q ¯ of Δ P Q R . Also, R T ¯ bisects ∠ P R Q , and ∠ P ≅ ∠ Q . If ∠ 1 and ∠ 2 are the angles formed when R T ¯ intersects P Q ¯ , explain why ∠ 1 ≅ ∠ 2 .

Polygon with three sides, three angles, and three vertices. Based on the properties of each side, the types of triangles are scalene (triangle with three three different lengths and three different angles), isosceles (angle with two equal sides and two equal angles), and equilateral (three equal sides and three angles of 60°). The types of angles are acute (less than 90°); obtuse (greater than 90°); and right (90°).

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Chapter 2.4, Problem 11E

Chapter 2.4, Problem 13E

Chapter 2 Solutions

Elementary Geometry for College Students

Ch. 2.1 - Prob. 1E Ch. 2.1 - For Exercises 1 to 4, lm with transversal v. If...Ch. 2.1 - For Exercises 1 to 4, lm with transversal v. If...Ch. 2.1 - Prob. 4E Ch. 2.1 - Use drawings, as needed, to answer each question....Ch. 2.1 - Use drawings, as needed, to answer each question....Ch. 2.1 - Use drawings, as needed, to answer each question....Ch. 2.1 - Use drawings, as needed, to answer each question....Ch. 2.1 - Use drawings, as needed, to answer each question....Ch. 2.1 - In Euclidean geometry, how many lines can be drawn...

Ch. 2.1 - Lines r and s are cut by the transversal t. Which...Ch. 2.1 - ADBC, ABDC, and mA=92. Find: a mB b mC c mD Ch. 2.1 - lm, with transversal t and OQ bisects MNO. If...Ch. 2.1 - Given: lm Transversal t m1=4x+2 m6=4x2 Find: x and...Ch. 2.1 - Given: mn Transversal k m3=x23x m6=(x+4)(x5) Find:...Ch. 2.1 - Given: mn Transversal k m1=5x+y m2=3x+y m8=3x+5y...Ch. 2.1 - Given: mn Transversal k m3=6x+y m5=8x+2y m6=4x+7y...Ch. 2.1 - In the three-dimensional figure, CAAB and BEAB....Ch. 2.1 - Given: lmand34 Prove: 14 See figure below. PROOF...Ch. 2.1 - Given: lmandmn Prove: 14 PROOF Statements Reasons...Ch. 2.1 - Given: CEDF Transversal AB CX bisects ACE DE...Ch. 2.1 - Given: CEDF Transversal AB DE bisects CDF Prove:...Ch. 2.1 - Given: rs Transversal t 1 is a right Prove: 2 is...Ch. 2.1 - Given: ABDEmBAC=42mEDC=54 Find: mACD HINT: There...Ch. 2.1 - Given: ABDEmBAC+mCDE=93 Find: mACD See Hint in...Ch. 2.1 - Prob. 26E Ch. 2.1 - In triangle ABC, line t is drawn through vertex A...Ch. 2.1 - In Exercises 30 to 32, write a formal proof of...Ch. 2.1 - In Exercises 30 to 32, write a formal proof of...Ch. 2.1 - In Exercises 30 to 32, write a formal proof of...Ch. 2.1 - Suppose that two lines are cut by a transversal in...Ch. 2.1 - Prob. 32E Ch. 2.1 - Prob. 33E Ch. 2.1 - Given: Triangle MNQ with obtuse MNQ Construct:...Ch. 2.1 - Prob. 35E Ch. 2.1 - Given: A line m and a point T not on m Suppose...Ch. 2.2 - Note: Exercises preceded by an asterisk are of a...Ch. 2.2 - Note: Exercises preceded by an asterisk are of a...Ch. 2.2 - Prob. 3E Ch. 2.2 - Note: Exercises preceded by an asterisk are of a...Ch. 2.2 - In Exercises 5 to 10, draw a conclusion where...Ch. 2.2 - Prob. 6E Ch. 2.2 - Prob. 7E Ch. 2.2 - Prob. 8E Ch. 2.2 - Prob. 9E Ch. 2.2 - Prob. 10E Ch. 2.2 - Which of the following statements would you prove...Ch. 2.2 - Prob. 12E Ch. 2.2 - Prob. 13E Ch. 2.2 - Prob. 14E Ch. 2.2 - Prob. 15E Ch. 2.2 - Prob. 16E Ch. 2.2 - Prob. 17E Ch. 2.2 - Prob. 18E Ch. 2.2 - Prob. 19E Ch. 2.2 - Prob. 20E Ch. 2.2 - A periscope uses an indirect method of...Ch. 2.2 - Some stores use an indirect method of observation....Ch. 2.2 - Prob. 23E Ch. 2.2 - Prob. 24E Ch. 2.2 - Prob. 25E Ch. 2.2 - Prob. 26E Ch. 2.2 - In Exercises 23 to 34, give the indirect proof for...Ch. 2.2 - Prob. 28E Ch. 2.2 - Prob. 29E Ch. 2.2 - Prob. 30E Ch. 2.2 - Prob. 31E Ch. 2.2 - Prob. 32E Ch. 2.2 - Prob. 33E Ch. 2.2 - Prob. 34E Ch. 2.3 - In Exercises 1 to 6, l and m are cut by...Ch. 2.3 - In Exercises 1 to 6, l and m are cut by...Ch. 2.3 - Prob. 3E Ch. 2.3 - In Exercises 1 to 6, l and m are cut by...Ch. 2.3 - In Exercises 1 to 6, l and m are cut by...Ch. 2.3 - In Exercises 1 to 6, l and m are cut by...Ch. 2.3 - In Exercise 7 to 16, name the lines if any that...Ch. 2.3 - In Exercise 7 to 16, name the lines if any that...Ch. 2.3 - In Exercise 7 to 16, name the lines if any that...Ch. 2.3 - In Exercise 7 to 16, name the lines if any that...Ch. 2.3 - In Exercise 7 to 16, name the lines if any that...Ch. 2.3 - In Exercise 7 to 16, name the lines if any that...Ch. 2.3 - In Exercise 7 to 16, name the lines if any that...Ch. 2.3 - In Exercise 7 to 16, name the lines if any that...Ch. 2.3 - In Exercise 7 to 16, name the lines if any that...Ch. 2.3 - In Exercise 7 to 16, name the lines if any that...Ch. 2.3 - Prob. 17E Ch. 2.3 - In Exercises 17 and 18, complete each proof by...Ch. 2.3 - In Exercises 19 to 22, complete the proof. Given:...Ch. 2.3 - In Exercise 19 to 22 complete the proof. Given: 1 ...Ch. 2.3 - In Exercise 19 to 22 complete the proof. Given: DE...Ch. 2.3 - In Exercise 19 to 22 complete the proof. Given: XY...Ch. 2.3 - In Exercise 23 to 30, determine the value of x so...Ch. 2.3 - In Exercise 23 to 30, determine the value of x so...Ch. 2.3 - In Exercise 23 to 30, determine the value of x so...Ch. 2.3 - In Exercise 23 to 30, determine the value of x so...Ch. 2.3 - In Exercise 23 to 30, determine the value of x so...Ch. 2.3 - In Exercise 23 to 30, determine the value of x so...Ch. 2.3 - In Exercise 23 to 30, determine the value of x so...Ch. 2.3 - In Exercise 23 to 30, determine the value of x so...Ch. 2.3 - Prob. 31E Ch. 2.3 - In Exercises 31 to 33, give a formal proof for...Ch. 2.3 - Prob. 33E Ch. 2.3 - Prob. 34E Ch. 2.3 - Prob. 35E Ch. 2.3 - Prob. 36E Ch. 2.3 - Prob. 37E Ch. 2.3 - Given: m2+m3=90 BE bisects ABC CE bisects BCD...Ch. 2.4 - In Exercise 1 to 4, refer to ABC . On the basis of...Ch. 2.4 - In Exercise 1 to 4, refer to ABC . On the basis of...Ch. 2.4 - In Exercise 1 to 4, refer to ABC . On the basis of...Ch. 2.4 - In Exercise 1 to 4, refer to ABC . On the basis of...Ch. 2.4 - Describe the auxiliary line segment as determined,...Ch. 2.4 - Describe the auxiliary line segment as determined,...Ch. 2.4 - In Exercises 7 and 8, classify the trianglenot...Ch. 2.4 - In Exercises 7 and 8, classify the trianglenot...Ch. 2.4 - In Exercises 9 and 10, classify the triangle not...Ch. 2.4 - In Exercises 9 and 10, classify the triangle not...Ch. 2.4 - In Exercises 11 and12, make drawings as needed....Ch. 2.4 - In Exercises 11 and 12, make drawings as needed....Ch. 2.4 - In Exercises 13 to 15, jk and ABC. Given:...Ch. 2.4 - In Exercises 13 to 15, jk and ABC. Given:...Ch. 2.4 - In Exercises 13 to 15, jk and. ABC. Given:...Ch. 2.4 - Given: MNNQ and s as shown Find: x, y, and z Ch. 2.4 - Given: ABDC DB bisects ADC mA=110 Find: m3 Ch. 2.4 - Given: ABDC DB bisects ADC m1=36 Find: mA Ch. 2.4 - Prob. 19E Ch. 2.4 - Given: ABC with BDCE m1=2xm3=x Find: mB in terms...Ch. 2.4 - Given: ADE with m1=m2=x Find: mDAE=x2 x, m1, and...Ch. 2.4 - Given: ABC with mB=mC=x2 Find: mBAC=x x, mBAC, and...Ch. 2.4 - Consider any triangle and one exterior angle at...Ch. 2.4 - Given: Right ABC with right C m1=7x+4m2=5x+2 Find:...Ch. 2.4 - In Exercises 25 to 27 , see the figure for...Ch. 2.4 - In Exercises 25 to 27 , see the figure for...Ch. 2.4 - Prob. 27E Ch. 2.4 - Given: m1=8(x+2)m3=5x3m5=5(x+1)2 Find: x Ch. 2.4 - Given: Find: , , and Ch. 2.4 - Given: Equiangular RST Prove: RV bisects SRT RVS...Ch. 2.4 - Prob. 31E Ch. 2.4 - The sum of the measures of two angles of a...Ch. 2.4 - Draw, if possible, an a isosceles obtuse triangle....Ch. 2.4 - Prob. 34E Ch. 2.4 - Along a straight shoreline, two houses are located...Ch. 2.4 - An airplane has leveled off is flying horizontally...Ch. 2.4 - Prob. 37E Ch. 2.4 - The roofline of a house shows the shape of a right...Ch. 2.4 - A lamppost has design such that mC=110 and AB....Ch. 2.4 - For the lamppost of Exercise 39, Suppose that...Ch. 2.4 - Prob. 41E Ch. 2.4 - Prob. 42E Ch. 2.4 - Prob. 43E Ch. 2.4 - Explain why the following statement is true. The...Ch. 2.4 - Prob. 45E Ch. 2.4 - Prob. 46E Ch. 2.4 - Prob. 47E Ch. 2.4 - Given: AB, DE and CF ABDE CG bisects BCF FG...Ch. 2.4 - Given: NQ bisects MNP PQ bisects MPR mQ=42 Find:...Ch. 2.4 - Prob. 50E Ch. 2.5 - For Exercises 1 and 2, consider a group of regular...Ch. 2.5 - For Exercises 1 and 2, consider a group of regular...Ch. 2.5 - Given: ABDC, ADBC, AEFC, with angle measures as...Ch. 2.5 - In pentagon ABCDE with BDE, find the measure of...Ch. 2.5 - Find the total number of diagonals for a polygon...Ch. 2.5 - Find the total number of diagonals for a polygon...Ch. 2.5 - Find the sum of the measures of the interior...Ch. 2.5 - Find the sum of the measures of the interior...Ch. 2.5 - Find the measure of each interior angle of a...Ch. 2.5 - Find the measure of each interior angle of a...Ch. 2.5 - Find the measures of each exterior angle of a...Ch. 2.5 - Find the measures of each exterior angle of a...Ch. 2.5 - Find the number of sides for a polygon whose sum...Ch. 2.5 - Find the number of sides for a polygon whose sum...Ch. 2.5 - Find the number of sides for a regular polygon...Ch. 2.5 - Find the number of sides for a regular polygon...Ch. 2.5 - Find the number of sides for a regular polygon...Ch. 2.5 - Find the number of sides for a regular polygon...Ch. 2.5 - What is the measure of each interior angle of a...Ch. 2.5 - Lug bolts are equally spaced about the wheel to...Ch. 2.5 - Prob. 21E Ch. 2.5 - Prob. 22E Ch. 2.5 - Prob. 23E Ch. 2.5 - Prob. 24E Ch. 2.5 - Prob. 25E Ch. 2.5 - Prob. 26E Ch. 2.5 - Given: Quadrilateral RSTQ with exterior s at R and...Ch. 2.5 - Given: Regular hexagon ABCDEF with diagonal AC and...Ch. 2.5 - Given: Quadrilateral RSTV with diagonals RT and SV...Ch. 2.5 - Given: Quadrilateral ABCD with BAAD and BCDC...Ch. 2.5 - A father wishes to make a baseball home plate for...Ch. 2.5 - The adjacent interior and exterior angles of a...Ch. 2.5 - Find the measure of each a acute interior angle of...Ch. 2.5 - Find the measure of each a acute interior angle of...Ch. 2.5 - Consider any regular polygon; find and join in...Ch. 2.5 - Consider a regular hexagon RSTUVW. What does...Ch. 2.5 - The face of a clock has the shape of a regular...Ch. 2.5 - The top surface of a picnic table is in the shape...Ch. 2.5 - Prob. 39E Ch. 2.5 - For the concave quadrilateral ABCD, explain why...Ch. 2.5 - If mA=20, mB=88 and mC=31, find the measure of the...Ch. 2.5 - Is it possible for a polygon to have the following...Ch. 2.5 - Is it possible for a regular polygon to have the...Ch. 2.5 - Draw a concave hexagon that has: a one interior...Ch. 2.5 - Draw a concave pentagon that has: a one interior...Ch. 2.5 - For concave pentagon ABCDE, find the measure of...Ch. 2.5 - For concave hexagon HJKLMN, mH=y and the measure...Ch. 2.6 - Prob. 1E Ch. 2.6 - Prob. 2E Ch. 2.6 - Prob. 3E Ch. 2.6 - Which letters have symmetry with respect to a...Ch. 2.6 - Prob. 5E Ch. 2.6 - Prob. 6E Ch. 2.6 - Prob. 7E Ch. 2.6 - Prob. 8E Ch. 2.6 - Prob. 9E Ch. 2.6 - Prob. 10E Ch. 2.6 - Prob. 11E Ch. 2.6 - Prob. 12E Ch. 2.6 - Prob. 13E Ch. 2.6 - Prob. 14E Ch. 2.6 - Prob. 15E Ch. 2.6 - Suppose that square RSTV slides point for point to...Ch. 2.6 - Prob. 17E Ch. 2.6 - Prob. 18E Ch. 2.6 - Prob. 19E Ch. 2.6 - Prob. 20E Ch. 2.6 - Prob. 21E Ch. 2.6 - Prob. 22E Ch. 2.6 - In which direction clockwise or counterclockwise...Ch. 2.6 - In which direction clockwise or counterclockwise...Ch. 2.6 - Prob. 25E Ch. 2.6 - Prob. 26E Ch. 2.6 - Prob. 27E Ch. 2.6 - Prob. 28E Ch. 2.6 - Prob. 29E Ch. 2.6 - Prob. 30E Ch. 2.6 - A regular hexagon is rotated about a centrally...Ch. 2.6 - A regular octagon is rotated about a centrally...Ch. 2.6 - Prob. 33E Ch. 2.6 - XYZ is the image of XYZ following a 100...Ch. 2.6 - Hexagon ABCBAD is determined when the open figure...Ch. 2.6 - Prob. 36E Ch. 2.CR - Prob. 1CR Ch. 2.CR - Prob. 2CR Ch. 2.CR - Prob. 3CR Ch. 2.CR - Prob. 4CR Ch. 2.CR - Given: mDCA=130mBAC=2x+ymBCE=150mDEC=2xy Find: x...Ch. 2.CR - Prob. 6CR Ch. 2.CR - Prob. 7CR Ch. 2.CR - Prob. 8CR Ch. 2.CR - For Review Exercises 7 to 11, use the given...Ch. 2.CR - For Review Exercises 7 to 11, use the given...Ch. 2.CR - For Review Exercises 7 to 11, use the given...Ch. 2.CR - Prob. 12CR Ch. 2.CR - Prob. 13CR Ch. 2.CR - Prob. 14CR Ch. 2.CR - For Review Exercises 12 to 15 , find the values of...Ch. 2.CR - Given: m1=x212 m4=x(x2) Find: x so that ABCD Ch. 2.CR - Prob. 17CR Ch. 2.CR - Prob. 18CR Ch. 2.CR - Prob. 19CR Ch. 2.CR - For Review Exercises 19 to 24, decide whether the...Ch. 2.CR - Prob. 21CR Ch. 2.CR - Prob. 22CR Ch. 2.CR - Prob. 23CR Ch. 2.CR - Prob. 24CR Ch. 2.CR - Complete the following table for regular polygons....Ch. 2.CR - Prob. 26CR Ch. 2.CR - For Review Exercises 26 to 29, sketch, if...Ch. 2.CR - For Review Exercises 26 to 29, sketch, if...Ch. 2.CR - Prob. 29CR Ch. 2.CR - For Review Exercises 30 and 31, write the...Ch. 2.CR - For Review Exercises 30 and 31, write the...Ch. 2.CR - Which statementthe converse, the inverse, or the...Ch. 2.CR - Given: ABCF23 Prove: 13 Ch. 2.CR - Given: 1 is complementary to 2; 2 is complementary...Ch. 2.CR - Prob. 35CR Ch. 2.CR - Given: ACDCAB Prove: DACB Ch. 2.CR - Prob. 37CR Ch. 2.CR - Prob. 38CR Ch. 2.CR - Prob. 39CR Ch. 2.CR - Prob. 40CR Ch. 2.CR - Prob. 41CR Ch. 2.CR - Construct an equilateral triangle ABC with side...Ch. 2.CR - Prob. 43CR Ch. 2.CR - Prob. 44CR Ch. 2.CR - Prob. 45CR Ch. 2.CR - Complete the drawing so that the figure is...Ch. 2.CR - Prob. 47CR Ch. 2.CT - Consider the figure shown at the right. a Name the...Ch. 2.CT - In the accompanying figure, m2=68, m8=112, and...Ch. 2.CT - To prove a theorem of the form "If P, then Q" by...Ch. 2.CT - Assuming that statements 1 and 2 are true, draw a...Ch. 2.CT - Let all of the lines named be coplanar. Make a...Ch. 2.CT - Prob. 6CT Ch. 2.CT - Prob. 7CT Ch. 2.CT - Prob. 8CT Ch. 2.CT - Prob. 9CT Ch. 2.CT - Prob. 10CT Ch. 2.CT - Prob. 11CT Ch. 2.CT - Prob. 12CT Ch. 2.CT - Prob. 13CT Ch. 2.CT - Prob. 14CT Ch. 2.CT - Prob. 15CT Ch. 2.CT - In Exercises 16 and 18 , complete the missing...Ch. 2.CT - Prob. 17CT Ch. 2.CT - Prob. 18CT Ch. 2.CT - Prob. 19CT

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