Answer
9.2
Work Step by Step
We see that the value of "a" is 3. Thus, we use trigonometry to find:
$tan72^{\circ}=\frac{h}{h3} \\ h = 3tan72^{\circ} =9.2 $
Elementary Geometry for College Students (5th Edition)
by Alexander, Daniel C.; Koeberlein, Geralyn M.
Published by
Brooks Cole
ISBN 10:
1439047901
ISBN 13:
978-1-43904-790-3
Chapter 11 - Section 11.3 - The Tangent Ratio and Other Ratios - Exercises - Page 519: 47a
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