Answer
90$^{\circ}$
Work Step by Step
To find the supplement of an angle simply subtract the given angle from 180$^{\circ}$.
180$^{\circ}$ - 90$^{\circ}$ = 90$^{\circ}$
Therefore the supplement of 90$^{\circ}$ is 90$^{\circ}$.
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 - 8.2 Angles and Their Relationships - 8.2 Exercises - Page 544: 13
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