Elementary Geometry for College Students (7th Edition)

Published by Cengage
ISBN 10: 978-1-337-61408-5
ISBN 13: 978-1-33761-408-5

Chapter 11 - Test - Page 534: 19

Answer

$x = 8$ units

Work Step by Step

$x^{2} = (8)^{2} + (12)^{2} - 2(8)(12)cos(60)$ $x^{2} = 16 + 144 - 192cos(60)$ $x^{2} = 160 - 192cos(60)$ $x^{2} = 160 - 96$ $x^{2} = 64$ $x = \sqrt {64}$ $x = 8$ units
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