#### Answer

90$^\circ$

#### Work Step by Step

Supplementary angles have a sum of 180$^\circ$.
x+90=180
x=180-90
x=90$^\circ$

Published by
Pearson

ISBN 10:
0-13417-805-X

ISBN 13:
978-0-13417-805-9

90$^\circ$

Supplementary angles have a sum of 180$^\circ$.
x+90=180
x=180-90
x=90$^\circ$

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