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Complementary Angles

Complementary Angles

One-page printable reference

See It in Action

Two examples of the idea done right—and one common look-alike that is not right.

EXAMPLE

EXAMPLE

NON-EXAMPLE

Definition

Complementary angles are two angles whose measures add up to 90 degrees.


They don’t have to be next to each other—just as long as their angle measures total 90°.

Video


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