Complementary angles consist of 2 angles that add up to 90 degrees; so the complimentary angle to a 31 degree angle is a 59 degree angle.
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A supplement of an angle is the angle that we add to the initial angle and have a result of 180 degrees. The supplement of 31 degrees is 180-31=149 degrees.
Suppose the larger angle is x degrees. Then the smaller angle is x - 2 degrees, and so they sum to 2x - 28 degrees. The two angles are complementary, so 2x - 28 = 90 is 2x = 90 + 28 = 118 so that x = 118/2 = 59 degrees and then x - 29 = 59 - 28 = 31 degrees. The two angles are 59 and 31 degrees.
Acute
A pair of supplementary angles add up to 180 degrees. Therefore, the supplement to a 149 degree angle is equal to 180 - 149 = 31 degrees.
Its 31 interior angles will add up to 5220 degrees