You subtract 90 degrees minus 80 degrees 25'. Note: You should convert the 90 degrees to 89 degrees and 60 minutes first, that way you can easily subtract degrees and minutes.
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Angles can be complementary. A 100 degree angle is a complementary angle to an 80 degree angle in geometry studies.
Complementary angles total 90o so 90 - 80 = 10; the complementary angle is 10o.
10
Let the angle be A, then the supplementary angle is (180 - A) and the complementary angle is (90 - A). But, 180 - A = 10(90 - A) = 900 - 10A 9A = 720 A = 80° The supplementary angle = 100° and the complementary angle = 10°
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.