Answer
The student found the perimeter instead of the area, and the student failed to write units on the file answer.
Work Step by Step
The correct method is as follows:
$$ A = .5bh \\ A= (.5)(8ft)(15ft) \\ A = 60 \ ft^2$$
Basic College Mathematics (10th Edition)
by Lial, Margaret L.; Salzman, Stanley A.; Hestwood, Diana L.
Published by
Pearson
ISBN 10:
0134467795
ISBN 13:
978-0-13446-779-5
Chapter 8 - Geometry - 8.5 Triangles - 8.5 Exercises - Page 565: 19
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