Geometry: Common Core (15th Edition)

Published by Prentice Hall
ISBN 10: 0133281159
ISBN 13: 978-0-13328-115-6

Chapter 1 - Tools of Geometry - Chapter Test: 17

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. $A=\pi r^2=\pi(4.5^2)=\pi(20.25)=63.62$
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