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Acute Angles

Angles that measure less than 90 degrees.

Obtuse Angles

Angles that measure more than 90 degrees but less that 180 degrees.

Straight angle

An angle that is 180 degrees.

Right Angle

A angle that measures exactly 90 degrees.

Complementary Angles

Two angles in which the sum of their degrees add up to 90 degrees

Supplementary Angles

Two angles in which the sum of their degrees add up to 180 degrees.

Reflex Angle

An angle which is more than 180 degrees but less than 360 degrees.