Answer
$28300 \, in^2$
Work Step by Step
$C = 180-(A+B) = 66.1^\circ$
$S = \dfrac{a^2 \sin{B} \sin{C}}{2 \sin{A}} = \dfrac{(210)^2 \sin{71.4} \sin{66.1}} {2\sin{42.5}}$
$S = 28300 \, in^2$
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: 19
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