Answer
$ A = \frac{e^2 \sqrt3}{4}$
Work Step by Step
Each side is an equilateral triangle. We know that the area of an equilateral triangle is:
$A = \frac{s^2 \sqrt3}{4} = \frac{e^2 \sqrt3}{4}$
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 9 - Section 9.2 - Pyramids, Area, and Volume - Exercises - Page 418: 37a
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