Answer
$6$ square units
Work Step by Step
By Heron's formula, $K=\sqrt{s(s-a)(s-b)(s-c)}$, where $s=\frac{a+b+c}{2}.$
Hence, here we have:
$s=\frac{4+3+5}{2}=6$
Thus,
$K=\sqrt{6(6-4)(6-3)(6-5)}=6.$
Precalculus (10th Edition)
by Sullivan, Michael
Published by
Pearson
ISBN 10:
0-32197-907-9
ISBN 13:
978-0-32197-907-0
Chapter 8 - Applications of Trigonometric Functions - Chapter Review - Review Exercises - Page 557: 23
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