Subtract 35 from 90 to get the complementary angle.
If you're looking for supplementary subtract from 180.
90-35
=55
.
. . The Complementary angle = 55
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90 minus A = complementary angle
No angle can be complementary to a 140 degree angle, as the sum of complementary angles is 90 degrees. But angles which are supplementary to each other add together to form a 180 degree angle.
A pair of complementary angles sum up to 90 degrees. In this instance, the complement of a 55-degree angle is 90 - 55 = 35 degrees.
42 degrees
The supplement of a 35 degree angle would be 145 degree angle.