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Math Geometry Elementary Geometry for College Students

Use the drawing provided for the proof of the theorem “The line segment that joins the midpoints of two sides of a triangle is parallel to the third side of the triangle.” Proof: Given △ A B C with vertices as shown, let M and n name the midpoints of sides C B - and A B - , respectively. Then

Use the drawing provided for the proof of the theorem “The line segment that joins the midpoints of two sides of a triangle is parallel to the third side of the triangle.” Proof: Given △ A B C with vertices as shown, let M and n name the midpoints of sides C B - and A B - , respectively. Then

Solution Summary: The author explains that the line segment that joins the midpoints of two sides of a triangle is parallel to the third side of the 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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Chapter 10.CT, Problem 20CT

Use the drawing provided for the proof of the theorem “The line segment that joins the midpoints of two sides of a triangle is parallel to the third side of the triangle.”

Chapter 10.CT, Problem 20CT, Use the drawing provided for the proof of the theorem The line segment that joins the midpoints of

Proof: Given △ A B C with vertices as shown, let M and n name the midpoints of sides C B - and A B - , respectively. Then

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 10.CT, Problem 19CT

Chapter 10.CT, Problem 21CT

Chapter 10 Solutions

Elementary Geometry for College Students

Ch. 10.1 - Plot and then label the points A0,-3, B3,-4, C5,...Ch. 10.1 - Give the coordinates of each point A, B, C, D, and...Ch. 10.1 - Find the distance between each pair of points: a...Ch. 10.1 - If the distance between -2, 3 and -2,a is 5 units,...Ch. 10.1 - If the distance between b,3 and 7, 3 is 3.5 units,...Ch. 10.1 - Prob. 6E Ch. 10.1 - Find the distance between each pair of points: a...Ch. 10.1 - Find the distance between each pair of points: a...Ch. 10.1 - Find the midpoint of the line segment that joins...Ch. 10.1 - Prob. 10E

Ch. 10.1 - Points A and B have symmetry with respect to the...Ch. 10.1 - Points A and B have symmetry with respect to point...Ch. 10.1 - Points A and B have symmetry with respect to point...Ch. 10.1 - Points A and B have symmetry with respect to the...Ch. 10.1 - Prob. 15E Ch. 10.1 - Points A and B have symmetry with respect to the...Ch. 10.1 - Points A and B have symmetry with respect to the...Ch. 10.1 - Prob. 18E Ch. 10.1 - Points A and B have symmetry with respect to a...Ch. 10.1 - In Exercises 20 to 22, apply the Midpoint Formula....Ch. 10.1 - Prob. 21E Ch. 10.1 - Prob. 22E Ch. 10.1 - A rectangle ABCD has three of its vertices at...Ch. 10.1 - A rectangle MNPQ has three of its vertices at M0,...Ch. 10.1 - Use the Distance Formula to determine the type of...Ch. 10.1 - Use the method of Example 4 to find the equation...Ch. 10.1 - Use the method of Example 4 to find the equation...Ch. 10.1 - For coplanar points A,B, and C, suppose that you...Ch. 10.1 - Prob. 29E Ch. 10.1 - Prob. 30E Ch. 10.1 - Prob. 31E Ch. 10.1 - There are two points on the x-axis that are...Ch. 10.1 - The triangle that has vertices at...Ch. 10.1 - Use the boxing method as suggested in Exercise 33,...Ch. 10.1 - Determine the area of ABC if A=2,1,B=5,3,andC is...Ch. 10.1 - Find the area of ABC In Exercise 35, but assume...Ch. 10.1 - Find the exact volume of the solid that results...Ch. 10.1 - Find the exact volume of the solid that results...Ch. 10.1 - Find the exact volume of the solid that results...Ch. 10.1 - Find the exact volume of the solid that results...Ch. 10.1 - Find the exact lateral area of each solid in...Ch. 10.1 - Find the volume of the solid formed when the...Ch. 10.1 - By definition, an ellipse is the locus of points...Ch. 10.1 - By definition, a hyperbola is the locus of points...Ch. 10.1 - Prob. 45E Ch. 10.1 - Use the Distance Formula to show that the equation...Ch. 10.1 - Following a 90 counterclockwise rotation about the...Ch. 10.1 - Consider the point Ca,b. What is the image of C...Ch. 10.1 - Prob. 49E Ch. 10.2 - In Exercises 1 to 8, draw the graph of each...Ch. 10.2 - Prob. 2E Ch. 10.2 - Prob. 3E Ch. 10.2 - Prob. 4E Ch. 10.2 - In Exercises 1 to 8, draw the graph of each...Ch. 10.2 - Prob. 6E Ch. 10.2 - Prob. 7E Ch. 10.2 - Prob. 8E Ch. 10.2 - Which points lie on the graph of 5x-4y=32? a 4,-3...Ch. 10.2 - Prob. 10E Ch. 10.2 - Find the slopes of the lines containing: a 2,-3...Ch. 10.2 - Prob. 12E Ch. 10.2 - Find x so that AB- has slope m, where: a A is...Ch. 10.2 - Prob. 14E Ch. 10.2 - Are these points collinear? a A-2,5, B0,2, and...Ch. 10.2 - Are these points collinear? a A-1,-2, B3,2, and...Ch. 10.2 - Parallel lines l1 and l2 have slopes m1 and m2,...Ch. 10.2 - Prob. 18E Ch. 10.2 - Perpendicular lines l1 and l2 have slopes m1 and...Ch. 10.2 - Prob. 20E Ch. 10.2 - In Exercises 21 to 24, state whether the lines are...Ch. 10.2 - In Exercises 21 to 24, state whether the lines are...Ch. 10.2 - In Exercises 21 to 24, state whether the lines are...Ch. 10.2 - In Exercises 21 to 24, state whether the lines are...Ch. 10.2 - Find x such that the points Ax,5, B2,3, and C4,-5...Ch. 10.2 - Find a such that the points A1,3, B4,5, and Ca,a...Ch. 10.2 - Find x such that the line through 2,-3 and 3,2 is...Ch. 10.2 - Find x such that the line through 2,-3 and 3,2 is...Ch. 10.2 - Prob. 29E Ch. 10.2 - Prob. 30E Ch. 10.2 - Prob. 31E Ch. 10.2 - In Exercises 29 to 34, draw the line described....Ch. 10.2 - In Exercises 29 to 34, draw the line described....Ch. 10.2 - In Exercises 29 to 34, draw the line described....Ch. 10.2 - Use slopes to decide whether the triangle with...Ch. 10.2 - If A2,2, B7,3, and C4,x are the vertices of a...Ch. 10.2 - If 2,3, 5,-2, and 7,2 are three vertices not...Ch. 10.2 - Three vertices of rectangle ABCD are A-5,1,...Ch. 10.2 - Show that quadrilateral RSTV is an isosceles...Ch. 10.2 - Show that quadrilateral ABCD is a parallelogram.Ch. 10.2 - Quadrilateral EFGH has the vertices E0,0, Fa,0,...Ch. 10.2 - Prob. 42E Ch. 10.2 - Prob. 43E Ch. 10.2 - Prove that if two lines neither horizontal nor...Ch. 10.2 - Prob. 45E Ch. 10.2 - Prob. 46E Ch. 10.3 - Find an expression for a The distance between a,0...Ch. 10.3 - Find the coordinates of the midpoint of the...Ch. 10.3 - Find the slope of the line containing the points a...Ch. 10.3 - Prob. 4E Ch. 10.3 - Prob. 5E Ch. 10.3 - Prob. 6E Ch. 10.3 - Prob. 7E Ch. 10.3 - In Exercises 5 to 10, the real numbers a, b, c,...Ch. 10.3 - Prob. 9E Ch. 10.3 - In Exercises 5 to 10, the real numbers a, b, c,...Ch. 10.3 - In Exercises 11 to 16, supply the missing...Ch. 10.3 - In Exercises 11 to 16, supply the missing...Ch. 10.3 - In Exercises 11 to 16, supply the missing...Ch. 10.3 - Prob. 14E Ch. 10.3 - In Exercises 11 to 16, supply the missing...Ch. 10.3 - In Exercises 11 to 16, supply the missing...Ch. 10.3 - In Exercises 17 to 22, draw an ideally placed...Ch. 10.3 - Prob. 18E Ch. 10.3 - Prob. 19E Ch. 10.3 - In Exercises 17 to 22, draw an ideally placed...Ch. 10.3 - In Exercises 17 to 22, draw an ideally placed...Ch. 10.3 - Prob. 22E Ch. 10.3 - In Exercises 23 to 28, find the equation...Ch. 10.3 - In Exercises 23 to 28, find the equation...Ch. 10.3 - In Exercises 23 to 28, find the equation...Ch. 10.3 - In Exercises 23 to 28, find the equation...Ch. 10.3 - In Exercises 23 to 28, find the equation...Ch. 10.3 - Prob. 28E Ch. 10.3 - The drawing shows isosceles ABC with AC-BC-. a...Ch. 10.3 - The drawing shows parallelogram RSTV. a What type...Ch. 10.3 - Prob. 31E Ch. 10.3 - Which formula would you use to establish each of...Ch. 10.3 - Prob. 33E Ch. 10.3 - Prob. 34E Ch. 10.3 - In Exercises 33 to 36, draw and label a...Ch. 10.3 - In Exercises 33 to 36, draw and label a...Ch. 10.3 - In RST, SV- bisects RST. Find the coordinates of...Ch. 10.4 - In Exercises 1 to 17, complete an analytic proof...Ch. 10.4 - In Exercises 1 to 17, complete an analytic proof...Ch. 10.4 - In Exercises 1 to 17, complete an analytic proof...Ch. 10.4 - In Exercises 1 to 17, complete an analytic proof...Ch. 10.4 - In Exercises 1 to 17, complete an analytic proof...Ch. 10.4 - Prob. 6E Ch. 10.4 - In Exercises 1 to 17, complete an analytic proof...Ch. 10.4 - In Exercises 1 to 17, complete an analytic proof...Ch. 10.4 - In Exercises 1 to 17, complete an analytic proof...Ch. 10.4 - Prob. 10E Ch. 10.4 - Prob. 11E Ch. 10.4 - In Exercises 1 to 17, complete an analytic proof...Ch. 10.4 - Prob. 13E Ch. 10.4 - Prob. 14E Ch. 10.4 - Prob. 15E Ch. 10.4 - Prob. 16E Ch. 10.4 - In Exercises 1 to 17, complete an analytic proof...Ch. 10.4 - Prob. 18E Ch. 10.4 - Use the analytic method to decide what type of...Ch. 10.4 - Use slopes to verify that the graphs of the...Ch. 10.4 - Prob. 21E Ch. 10.4 - Use the result in Exercise 20 to find the equation...Ch. 10.4 - Prob. 23E Ch. 10.4 - Prob. 24E Ch. 10.4 - Prob. 25E Ch. 10.4 - Suppose that the circle with center 0, 0 and...Ch. 10.4 - Prob. 28E Ch. 10.4 - Would the theorem of Exercise 7 remain true for a...Ch. 10.4 - Complete an analytic proof of the following...Ch. 10.5 - In Exercises 1 to 4, use division to write an...Ch. 10.5 - Prob. 2E Ch. 10.5 - In Exercises 1 to 4, use division to write an...Ch. 10.5 - Prob. 4E Ch. 10.5 - Prob. 5E Ch. 10.5 - Prob. 6E Ch. 10.5 - Prob. 7E Ch. 10.5 - Prob. 8E Ch. 10.5 - In Exercises 9 to 24, find an equation of the line...Ch. 10.5 - In Exercises 9 to 24, find an equation of the line...Ch. 10.5 - Prob. 11E Ch. 10.5 - In Exercises 9 to 24, find an equation of the line...Ch. 10.5 - Prob. 13E Ch. 10.5 - Prob. 14E Ch. 10.5 - Prob. 15E Ch. 10.5 - Prob. 16E Ch. 10.5 - Prob. 17E Ch. 10.5 - Prob. 18E Ch. 10.5 - In Exercises 9 to 24, find an equation of the line...Ch. 10.5 - In Exercises 9 to 24, find an equation of the line...Ch. 10.5 - Prob. 21E Ch. 10.5 - In Exercises 9 to 24, find an equation of the line...Ch. 10.5 - In Exercises 9 to 24, find an equation of the line...Ch. 10.5 - Prob. 24E Ch. 10.5 - Prob. 25E Ch. 10.5 - Prob. 26E Ch. 10.5 - In Exercises 27 to 32, use graphing to find the...Ch. 10.5 - Prob. 28E Ch. 10.5 - Prob. 29E Ch. 10.5 - Prob. 30E Ch. 10.5 - In Exercises 27 to 32, use graphing to find the...Ch. 10.5 - Prob. 32E Ch. 10.5 - In Exercises 33 to 38, use algebra to find the...Ch. 10.5 - Prob. 34E Ch. 10.5 - Prob. 35E Ch. 10.5 - In Exercises 33 to 38, use algebra to find the...Ch. 10.5 - Prob. 37E Ch. 10.5 - Prob. 38E Ch. 10.5 - Prob. 39E Ch. 10.5 - Prob. 40E Ch. 10.5 - Prob. 41E Ch. 10.5 - In Exercises 39 to 42, use substitution to solve...Ch. 10.5 - Prob. 43E Ch. 10.5 - For isosceles PNQ, the vertices are P-2a,0, N2a,0,...Ch. 10.5 - Prob. 45E Ch. 10.5 - Prob. 46E Ch. 10.5 - Prob. 47E Ch. 10.5 - Prob. 48E Ch. 10.5 - Prob. 49E Ch. 10.6 - In the Cartesian coordinate system below, name the...Ch. 10.6 - Prob. 2E Ch. 10.6 - Prob. 3E Ch. 10.6 - Find a direction vector for the line containing...Ch. 10.6 - For the line l:x,y,z=2,3,4+n3,-2,5, find a a point...Ch. 10.6 - For the line l:x,y,z=5,3,-2+n1,2,-2, find a a...Ch. 10.6 - Prob. 7E Ch. 10.6 - In vector form as in Exercises 5 and 6, find an...Ch. 10.6 - Prob. 9E Ch. 10.6 - Prob. 10E Ch. 10.6 - In Exercises 11 to 14, find the distance between...Ch. 10.6 - In Exercises 11 to 14, find the distance between...Ch. 10.6 - Prob. 13E Ch. 10.6 - Prob. 14E Ch. 10.6 - Prob. 15E Ch. 10.6 - In Exercises 15 to 18, find the midpoint of the...Ch. 10.6 - Prob. 17E Ch. 10.6 - In Exercises 15 to 18, find the midpoint of the...Ch. 10.6 - In Exercises 19 and 20, use the x, y, and...Ch. 10.6 - Prob. 20E Ch. 10.6 - Prob. 21E Ch. 10.6 - Prob. 22E Ch. 10.6 - In Exercises 23 to 26, find an equation for each...Ch. 10.6 - Prob. 24E Ch. 10.6 - Prob. 25E Ch. 10.6 - Prob. 26E Ch. 10.6 - Prob. 27E Ch. 10.6 - Prob. 28E Ch. 10.6 - Prob. 29E Ch. 10.6 - Prob. 30E Ch. 10.6 - Prob. 31E Ch. 10.6 - Prob. 32E Ch. 10.6 - Prob. 33E Ch. 10.6 - Prob. 34E Ch. 10.6 - Prob. 35E Ch. 10.6 - Prob. 36E Ch. 10.6 - The line x,y,z=3,4,5+n3,4,-5 intersects the sphere...Ch. 10.6 - Prob. 38E Ch. 10.6 - Prob. 39E Ch. 10.6 - For the sphers x-12+y+22+z-42=36 and x2+y2+z2=64,...Ch. 10.6 - Does the sphere x2+y2+z2=100 have symmetry with...Ch. 10.6 - Prob. 43E Ch. 10.6 - Lines l1: x,y,z=2,0,3+n2,-3,5 and l2:...Ch. 10.6 - The planes with the equation x+2z=12 and y-3z=6...Ch. 10.6 - Prob. 46E Ch. 10.6 - Prob. 49E Ch. 10.6 - Prob. 50E Ch. 10.CR - Find the distance between each pair of points: a...Ch. 10.CR - Prob. 2CR Ch. 10.CR - Find the midpoint of the line segment that joins...Ch. 10.CR - Prob. 4CR Ch. 10.CR - Find the slope of the line containing each pair of...Ch. 10.CR - Find the slope of the line containing each pair of...Ch. 10.CR - 2,1 is the midpoint of AB-, in which A has...Ch. 10.CR - Prob. 8CR Ch. 10.CR - If A has coordinates 2,1 and B has coordinates...Ch. 10.CR - Prob. 10CR Ch. 10.CR - Without graphing, determine whether the pair of...Ch. 10.CR - Determine whether the points -6,5, 1,7, and 16,10...Ch. 10.CR - Prob. 13CR Ch. 10.CR - Draw the graph of 3x+7y=21, and name the...Ch. 10.CR - Prob. 15CR Ch. 10.CR - Prob. 16CR Ch. 10.CR - Write an equation for a the line through 2,3 and...Ch. 10.CR - Prob. 18CR Ch. 10.CR - Show that the triangle whose vertices are A3,6,...Ch. 10.CR - Prob. 20CR Ch. 10.CR - Prob. 21CR Ch. 10.CR - Prob. 22CR Ch. 10.CR - In Exercises 23 and 24, solve the system of...Ch. 10.CR - In Exercises 23 and 24, solve the system of...Ch. 10.CR - Three of the four vertices of a parallelogram are...Ch. 10.CR - A3,1, B5,9, and C11,3 are the vertices of ABC. a...Ch. 10.CR - Prob. 27CR Ch. 10.CR - Prob. 28CR Ch. 10.CR - In Review Exercise 27 to 30, supply the missing...Ch. 10.CR - In Review Exercise 27 to 30, supply the missing...Ch. 10.CR - A2a,2b, B2c,2d, and C0,2e are the vertices of ABC....Ch. 10.CR - Prove the statements in Review Exercises 32 to 36...Ch. 10.CR - Prove the statements in Review Exercises 32 to 36...Ch. 10.CR - Prove the statements in Review Exercises 32 to 36...Ch. 10.CR - Prove the statements in Review Exercises 32 to 36...Ch. 10.CR - Prove the statements in Review Exercises 32 to 36...Ch. 10.CR - Determine whether ABC, with vertices A0,0,0,...Ch. 10.CR - Prob. 38CR Ch. 10.CR - Prob. 39CR Ch. 10.CR - Prob. 40CR Ch. 10.CT - Prob. 1CT Ch. 10.CT - Prob. 2CT Ch. 10.CT - Prob. 3CT Ch. 10.CT - Prob. 4CT Ch. 10.CT - Complete the following table of x and...Ch. 10.CT - Using the table from Exercise 5, sketch the graph...Ch. 10.CT - Prob. 7CT Ch. 10.CT - Prob. 8CT Ch. 10.CT - Prob. 9CT Ch. 10.CT - Prob. 10CT Ch. 10.CT - Prob. 11CT Ch. 10.CT - Prob. 12CT Ch. 10.CT - Using as few variables as possible, state the...Ch. 10.CT - Prob. 14CT Ch. 10.CT - In the figure, we see that mRS-=mVT-=0. Find the...Ch. 10.CT - Prob. 16CT Ch. 10.CT - Prob. 17CT Ch. 10.CT - Prob. 18CT Ch. 10.CT - Prob. 19CT Ch. 10.CT - Use the drawing provided for the proof of the...Ch. 10.CT - Prob. 21CT Ch. 10.CT - Prob. 22CT

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