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: 31d



Work Step by Step

$\frac{AD+DC}{AB}$=$\frac{AB}{AD}$ $\frac{AD+2}{2\sqrt 6}$=$\frac{2\sqrt 6}{AD}$ AD$^2$+2AD-24=0 (AD+6)(AD-4)=0 AD=4
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