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 5 - Review Exercises - Page 274: 31a



Work Step by Step

$\frac{DC}{BD}$=$\frac{BD}{AD}$ $\frac{DC}{12}$=$\frac{12}{9}$ 3DC=48 DC=16
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