Answer
Parallelogram
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 $x_{D}-x_{C}=a+b-b=a$
Elementary Geometry for College Students (6th Edition)
by Alexander, Daniel C.; Koeberlein, Geralyn M.
Published by
Brooks Cole
ISBN 10:
9781285195698
ISBN 13:
978-1-28519-569-8
Chapter 10 - Test - Page 487: 9
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