Answer
$w = 18.5$ units
Work Step by Step
$w^{2} = (14)^{2} + (21)^{2} - 2(14)(21)cos(60)$
$w^{2} = 196 + 441 - 588cos(60)$
by GDC / calculator
$w^{2} = 637 - 294$
$w^{2} = 343$
$w = \sqrt {343}$
$w = 18.5202...$ units
$w = 18.5$ units
Elementary Geometry for College Students (6th Edition)
by Alexander, Daniel C.; Koeberlein, Geralyn M.
Published by
Brooks Cole
ISBN 10:
9781285195698
ISBN 13:
978-1-28519-569-8
Chapter 11 - Review Exercises - Page 525: 12
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