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 Review - Page 74: 41


circumference is $15\pi\ m$ area is $56.25\pi\ m^2$

Work Step by Step

use the formula for cirumference $C=\pi d=\pi(15)=15\pi$ radius is half of diameter $r=\frac{1}{2}d=\frac{1}{2}(15)=7.5$ use the formula for area $A=\pi r^2=\pi(7.5^2)=56.25\pi$
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