Answer
$9.7\, ft^2$
Work Step by Step
$s = \dfrac{1}{2}(a+b+c) = dfrac{1}{2}(8.32+6.23+3.45) = 9 \, ft$
$S = \sqrt{s(s-a)(s-b)(s-c)} = \sqrt{9 (9-8.32)(9-6.23)(9-3.45)}$
$S = 9.7\, ft^2$
Trigonometry 7th Edition
by McKeague, Charles P.; Turner, Mark D.
Published by
Cengage Learning
ISBN 10:
1111826854
ISBN 13:
978-1-11182-685-7
Chapter 7 - Section 7.4 - The Area of a Triangle - 7.4 Problem Set - Page 396: 28
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