Answer
AE=6 ft
Work Step by Step
A=.5AE(AB+DC)
60=.5AE(7+13)
AE=$\frac{120}{20}$
AE=6
Elementary Geometry for College Students (7th Edition)
by Alexander, Daniel C.; Koeberlein, Geralyn M.
Published by
Cengage
ISBN 10:
978-1-337-61408-5
ISBN 13:
978-1-33761-408-5
Chapter 8 - Test - Page 398: 8
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