Answer
240
Work Step by Step
We find the height of each triangle:
$ h = \sqrt{13^2 - 5^2 }=\sqrt{144}=12$
Thus, we find the lateral area:
$A = (1/2)(12)(4)(10)=240$
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 417: 24a
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