Precalculus: Concepts Through Functions, A Unit Circle Approach to Trigonometry (3rd Edition)

Published by Pearson
ISBN 10: 0-32193-104-1
ISBN 13: 978-0-32193-104-7

Appendix A - Review - A.2 Geometry Essentials - A.2 Assess Your Understanding - Page A20: 48


$12\ ft^2$

Work Step by Step

Based on the given information, we have $BC=\sqrt {100}=10\ ft, BG=GF=\sqrt {16}=4\ ft$, thus the area of triangle CGF is $\frac{1}{2}(CG)(GF)=\frac{1}{2}(10-4)(4)=12\ ft^2$
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