Answer
$63.62\ cm^2$
Work Step by Step
Given the diameter, find the radius.
$r=\frac{1}{2}d=\frac{1}{2}9=4.5$
Use the formula for the area of a circle.
$A=\pi r^2=\pi(4.5^2)=\pi(20.25)=63.62$
Geometry: Common Core (15th Edition)
by Charles, Randall I.
Published by
Prentice Hall
ISBN 10:
0133281159
ISBN 13:
978-0-13328-115-6
Chapter 1 - Tools of Geometry - Chapter Test - Page 75: 17
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