To be both a complement and a supplement at the same time there can be no angle. However:
The angle 45° is self-complementary since 45° + 45° = 90°
The angle 90° is self-supplementary since 90° + 90° = 180°
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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
25
The supplement of an angle is the angle that, when added to the original angle, equals 180 degrees. The complement of an angle is the angle that, when added to the original angle, equals 90 degrees. Therefore, the supplement of the complement of a 38-degree angle would be the angle that, when added to the complement of 38 degrees (52 degrees), equals 180 degrees. This angle would be 128 degrees.
Complement . . . another angle, of 53 degrees Supplement . . . another angle, of 143 degrees