Answer
a)$10°$
b)$45°$
c)$83°$
Work Step by Step
a) $90 - 80 = 10°$
b) $90 - 45 = 45°$
c) $90 - 7 = 83°$
Basic College Mathematics (9th Edition)
by Lial, Margaret L.; Salzman, Stanley A.; Hestwood, Diana L.
Published by
Pearson
ISBN 10:
0321825535
ISBN 13:
978-0-32182-553-7
Chapter 8 - Geometry - Review Exercises - Page 614: 15
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