Answer
DC=26 feet
Work Step by Step
DC$^{2}$=AB$^{2}$+(BC-AD)$^{2}$
DC$^{2}$=576+100
DC$^{2}$=676
DC=26
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 4 - Section 4.4 - The Trapezoid - Exercises - Page 202: 40
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