Elementary Geometry for College Students (5th Edition)

Published by Brooks Cole
ISBN 10: 1439047901
ISBN 13: 978-1-43904-790-3

Chapter 9 - Section 9.2 - Pyramids, Area, and Volume - Exercises: 22a

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: $A = (1/2)(12)(4)(10)=240$
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