📐 Complementary Angles
Find the angle needed to reach 90 degrees (a Right Angle).
°
Input must be between 0° and 90° to have a positive complement.
Complementary Angle B
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°
90° Total
The Definition
For two complementary angles, A and B:
B = 90° – A
**Disclaimer:** The calculation assumes the input angle is in degrees. If the input angle is less than 0° or greater than 90°, the result will technically be correct (A + B = 90°), but the pair may not be visualized as part of a simple right angle.