Answer
$A=523.6~in^2$
Work Step by Step
$150°=150°(\frac{\pi~rad}{180°})=\frac{5\pi}{6}~rad$
$A=\frac{1}{2}r^2θ$
$A=\frac{1}{2}·20^2·\frac{5\pi}{6}=\frac{500\pi}{3}=523.6~in^2$
Algebra and Trigonometry 10th Edition
by Larson, Ron
Published by
Cengage Learning
ISBN 10:
9781337271172
ISBN 13:
978-1-33727-117-2
Chapter 6 - Review Exercises - Page 500: 29
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