Algebra 2 (1st Edition)

Published by McDougal Littell
ISBN 10: 0618595414
ISBN 13: 978-0-61859-541-9

Chapter 13, Trigonometric Ratios and Functions - 13.5 Apply the Law of Sines - 13.5 Exercises - Skill Practice - Page 887: 38



Work Step by Step

The area of a triangle can be calculated by multiplying two sides' length and the sine of their included angle by $0.5$. Hence here the area: $0.5\cdot15\cdot 13\cdot\sin(57^\circ)\approx81.8$
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