Algebra and Trigonometry 10th Edition

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 430: 10



Work Step by Step

Area of a circle: $A=\pi r^2=\frac{1}{2}r^2(2\pi)$ The area of a sector of a circle is proportional to the central angle: $A=\frac{1}{2}r^2(2\pi)(\frac{\theta}{2\pi})=\frac{1}{2}r^2\theta$
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