## Geometry: Common Core (15th Edition)

Published by Prentice Hall

# 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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