Answer
A$\approx$130 in$^2$
Work Step by Step
altitude=1.5r
a=15
s=$\frac{2a}{\sqrt 3}$
s=10$\sqrt 3$
Area=.5sa
A=75$\sqrt 3$
A$\approx$130 in$^2$
Elementary Geometry for College Students (5th Edition)
by Alexander, Daniel C.; Koeberlein, Geralyn M.
Published by
Brooks Cole
ISBN 10:
1439047901
ISBN 13:
978-1-43904-790-3
Chapter 8 - Section 8.3 - Regular Polygons and Area - Exercises - Page 378: 23
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