# 9.6: Supplementary and Complementary Angle Pairs

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**Practice**Supplementary and Complementary Angle Pairs

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Acute Angle

An acute angle is an angle with a measure of less than 90 degrees.Complementary angles

Complementary angles are a pair of angles with a sum of .Obtuse angle

An obtuse angle is an angle greater than 90 degrees but less than 180 degrees.Straight angle

A straight angle is a straight line equal to .Supplementary angles

Supplementary angles are two angles whose sum is 180 degrees.### Image Attributions

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Classify supplementary and complementary pairs of angles.

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Date Created:

Oct 29, 2012
Last Modified:

Jul 08, 2015
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