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9.6: Supplementary and Complementary Angle Pairs

Difficulty Level: At Grade Created by: CK-12
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    Vocabulary

    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 90^{\circ}.

    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 180^{\circ}.

    Supplementary angles

    Supplementary angles are two angles whose sum is 180 degrees.

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