Mathwords: Complementary Angles

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Complementary Angles

Two acute angles that add up to 90°. For example, 40° and 50° are complementary. In the diagram below, angles 1 and 2 are complementary.

See also

Complement of an angle, supplementary angles, measure of an angle

this page updated 15-jul-23
Mathwords: Terms and Formulas from Algebra I to Calculus
written, illustrated, and webmastered by Bruce Simmons
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