geometrywhat is an complemantry angle

4 Answers

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Karen P.L. Hardison | College Teacher | eNotes Employee

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Complementary angles in geometry are two angles whose sum equals 90 degrees. The tricky point is that while many complementary angles are seen in the same problem and thus are part of one angle configuration, they do not need to be side-by-side to be complementary. The only requirement is that the sum of their degrees adds up to 90 degrees; they may spatially separate.

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literaturenerd | High School Teacher | (Level 2) Educator Emeritus

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Complementary angles that add to 90 degrees, they are considered complementary. For example, the following are considered complimentary angles.

-45 degrees and 45 degrees

-30 degrees and 60 degrees

-15 degrees and 75 degrees

Each of the angles' sums equal to 90 degrees.

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litteacher8 | High School Teacher | (Level 3) Distinguished Educator

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Complementary angles are angles that add up to 90 degrees.  Each angle can be less than 90 degrees, as long as the sum of both angles is 90 degrees.  Supplementary angles add to 180 degrees.