A complementary angle adds to 90 degrees or pi/2 radians. A supplementary angle adds to 180 degrees or pi radians.
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The question asks for the complement of (the supplement of (80 degrees) ). We have to find the supplement of 80 first, and then find the complement of the supplement. The supplement of an angle is (180 - the angle). The complement of an angle is (90 - the angle). The supplement of 80 degrees is (180 - 80) = 100 degrees. The complement of that supplement is (90 - 100) = -10 degrees.
Complement: 22 Supplement: 112
complement: 90-23.5 = 66.5 degrees supplement: 180-23.5 = 156.5 degrees
25
Supplement of 130 deg = 180 - 130 = 50 deg Complement of 50 deg = 90 - 50 = 40 degrees