## Elementary Geometry for College Students (7th Edition)

Published by Cengage

# Chapter 8 - Section 8.3 - Regular Polygons and Area - Exercises - Page 376: 7

#### Answer

r$\approx$11.5 cm

#### Work Step by Step

s=2$\frac{a}{\sqrt 3}$ s=$\frac{20\sqrt 3}{3}$ r=2(.5s) r=s r=$\frac{20\sqrt 3}{3}$ r$\approx$11.5 cm

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