Answer
56.55 $ mm ^ 2 $
Work Step by Step
We know that the area is equal to:
$$A=\pi r^2 \times \frac{\theta}{2\pi \ radians}$$
We know that the area is equal to:
$$A=r^2 \times \frac{\theta}{2}$$
$$A=12^2 \times \frac{\pi/4}{2}=56.55$$
Algebra and Trigonometry 10th Edition
by Larson, Ron
Published by
Cengage Learning
ISBN 10:
9781337271172
ISBN 13:
978-1-33727-117-2
Chapter 6 - 6.1 - Angles and Their Measure - 6.1 Exercises - Page 432: 90
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