Answer
$A = 1520$ cm$^{2}$
Work Step by Step
$A = \frac{1}{2}absin(C)$
$= (0.5)((50)(70)sin(60)$
by GDC / calculator
$= (0.5)3500sin(60)$
$= (0.5)(3031.088913)$
$= 1515.54...$ cm
$= 1520$ cm$^{2}$
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: 11
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