Answer
$8.15 \, ft^2$
Work Step by Step
$s = \dfrac{1}{2}(a+b+c) = \dfrac{1}{2}(4.38+3.79+5.22) = 6.695 \, ft$
$S = \sqrt{s(s-a)(s-b)(s-c)} = \sqrt{6.695 (6.695-4.38)(6.695-3.79)(6.695-5.22)}$
$S = 8.15 \, ft^2$
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: 27
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