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When the sum of two angles is 90° then they are said to be Complementary Angles.
Two Angles are Complementary when they add up to 90 degrees (a Right Angle)
Illustration: Find the complement of 60, 55 and 82.
Solution: Let the angles be x, y and z
Illustration: Two angles are complementary. If one angle is two times the sum of other angle and 3, find the two angles.
Solution: Let the angle be x and its complementary be 90 - x
According to question: 90 - x = 2(x + 3)
OR 90 - x = 2x + 6
OR - x - 2x = 6 - 90
OR 3x = 84
x = 28
The angles are 28 and 62 are complementary angles.