Answer
111
Work Step by Step
We find the height of each triangle on the side:
$ h = \sqrt{8^2 - 3^2} = \sqrt{55}$
There are 5 sides of length 6, so:
$A = 1/2(6)(5)( \sqrt{55}) = 15 \sqrt{55} = 111$
Elementary Geometry for College Students (6th Edition)
by Alexander, Daniel C.; Koeberlein, Geralyn M.
Published by
Brooks Cole
ISBN 10:
9781285195698
ISBN 13:
978-1-28519-569-8
Chapter 9 - Section 9.2 - Pyramids, Area, and Volume - Exercises - Page 407: 22a
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