Elementary Geometry for College Students (5th Edition)

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 518: 19


$d \approx 8.1$ units

Work Step by Step

1. Use the cosine ratio to find $d$ Recall that CAH: $cos = \frac{adjacent}{hypotenuse}$ $cos(36) = \frac{d}{10}$ $d = 10cos(36)$ by GDC / calculator $d = 8.09016...$ units $d \approx 8.1$ units
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