180 - angle = supplement
180- 160 = 20 degrees
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160
The angle is 160 degrees and it's supplement is 20 degrees.
Suppose the angle is x then its supplement is 180 - x so 180 - x = x - 78 that is, 258 = 2x or x = 258/2 = 129 <><><><><> Angle + Supplement = 180 Angle = Supplement + 78 Solve for the system of equations... Angle + Supplement = 180 Angle - Supplement = 78 ------------------------------------- 2 Angle = 258 Angle = 129 Supplement = 51
The angle is 120°. Its supplement is 60°.
The supplement of an 80 degree angle is an 100 degree angle.