Algebra: A Combined Approach (4th Edition)

Published by Pearson
ISBN 10: 0321726391
ISBN 13: 978-0-32172-639-1

Appendix F - Exercise Set: 8

Answer

90°

Work Step by Step

Two angles are Supplementary if the sum of their measures is 180°. The supplement of a $90°$ angle is an angle whose measure is $180°-90° = 90° $ To check,notice that $90° + 90°= 180°$.
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