Elementary Geometry for College Students (6th Edition)

Published by Brooks Cole
ISBN 10:
ISBN 13:

Chapter 5 - Review Exercises - Page 263: 31c

Answer

AB=2$\sqrt 5$

Work Step by Step

$\frac{AB}{AD+DC}$=$\frac{AD}{AB}$ AB$^2$=20 AB=2$\sqrt 5$
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