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The measure of an angle is four times its supplement. Find the angle.

Class 7Pairs of AnglesLines and Angles

A144
B129
C159
D288

Step-by-Step Solution

Let the angle be

x

. Its supplement is

180 - x . x = 4 (180 - x)

gives

x = 720 - 4 x

, so

5 x = 720

and

x = 144

deg.

Answer: A) 144

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