complementary angles

English

Etymology

Complementary in the sense of completing, i.e. they form a complete right angle.

Noun

complementary angles

  1. (geometry) plural of complementary angle
    Let angle A = 30° and angle B = 10°, so that their complementary angles are A′ = 60° and B′ = 80°, respectively.

Noun

complementary angles pl (plural only)

  1. (geometry) A pair of angles that sum to a right angle.
    A = 30° and A′ = 60°, so A and A′ are complementary angles.

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See also

Further reading

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