# Chapter 1 - Tools of Geometry - 1-8 Perimeter, Circumference, and Area - Got It? - Page 61: 2

a) $48\pi$ m b) 75.4 m

#### Work Step by Step

a) Use the formula for the circumference of a circle. $C=2\pi r$ Substitute the given radius for r. $C=2\pi(24)=48\pi$ b) Use the formula for the circumference of a circle. $C=\pi d$ Substitute the given diameter for d. $C=\pi(24)$ Use a calculator to find the circumference. $C=75.4$

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