Elementary Geometry for College Students (7th Edition)

Published by Cengage
ISBN 10: 978-1-337-61408-5
ISBN 13: 978-1-33761-408-5

Chapter 10 - Test - Page 495: 9



Work Step by Step

AB is parallel to DC (and to the x-axis) and they are equal. The length of AB is $x_{B}-x_{A}=a-0=a$ The length of DC is $x_{D}-x_{C}=a+b-b=a$
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