# Chapter 2 - Section 2.6 - Problem Solving in Geometry - Exercise Set - Page 177: 18

r=8 in d=16 in

#### Work Step by Step

C=2$\pi$r 16$\pi$=2$\pi$r $\frac{16\pi}{2\pi}$=$\frac{2\pi r}{2\pi}$ 8=r r=8 in d=2r d=2(8) d=16 in

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