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    Supplementary Angles

    Alternate name

    supplementary angle

    Basic definition

    Supplementary angles are pairs of angles whose measures sum to 180 degrees.

    Detailed definition

    Two angles α and β for which α + β = π are said to be supplementary. In other words, α and β are supplementary angles if they produce a straight angle when combined.

    Related terms

    angle | complementary angles | digon | straight angle

    Educational grade level

    middle school level (California grade 6 standard)

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