Elementary Geometry for College Students (7th Edition) Clone

Published by Cengage
ISBN 10: 978-1-337-61408-5
ISBN 13: 978-1-33761-408-5

Chapter 6 - Review Exercises - Page 315: 24j

Answer

3

Work Step by Step

We use the theorems in the chapter to obtain: $6^2 = (CD)(9+CD) \\ CD^2 +9CD - 36 = 0 \\ (CD +12)(CD-3) = 0 \\ CD =3$ Note, CD cannot be negative.
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