Geometry: Common Core (15th Edition)

Published by Prentice Hall
ISBN 10: 0133281159
ISBN 13: 978-0-13328-115-6

Chapter 7 - Similarity - Common Core Cumulative Standards Review - Selected Response - Page 486: 16


$DE = 7.5$

Work Step by Step

The diagonals of a parallelogram bisect one another; therefore, if the entire diagonal is $15$, then each bisected segment is half of this length: $DE = \frac{1}{2}(15)$ Multiply to simplify: $DE = \frac{15}{2}$ Divide to solve: $DE = 7.5$
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