#### 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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Published by
Brooks Cole

ISBN 10:
9781285195698

ISBN 13:
978-1-28519-569-8

r$\approx$11.5 cm

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