Elementary Geometry for College Students (6th Edition)

Published by Brooks Cole
ISBN 10: 9781285195698
ISBN 13: 978-1-28519-569-8

Chapter 11 - Review Exercises - Page 525: 25


$\approx$ 5 cm

Work Step by Step

$\frac{side}{2}$ = apothem $\times tan (\frac{\pi}{5}$) $\frac{side}{2}$ $\approx$ 3.44 cm $\times$ 0.73 side $\approx$ 5 cm
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