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
Elementary Geometry for College Students (7th Edition)
by Alexander, Daniel C.; Koeberlein, Geralyn M.
Published by
Cengage
ISBN 10:
978-1-337-61408-5
ISBN 13:
978-1-33761-408-5
Chapter 8 - Section 8.3 - Regular Polygons and Area - Exercises - Page 376: 7
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