Review complementary and supplementary angles with Khan Academy's interactive lessons and practice exercises for seventh-grade geometry.

Learn about complementary and supplementary angles, as well as the definitions of adjacent and straight angles.

Review the basics of complementary and supplementary angles, and try some practice problems.

Practice telling whether two angles are supplementary, complementary, or vertical.

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Use your knowledge about complementary and supplementary angles to find missing angles.

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Review the basics of complementary and supplementary angles, and try some practice problems.

For example, if one angle is 120 degrees and another angle is 60 degrees, the two angles are supplementary. Complementary angles are two angles whose angle measures sum to 90 …

The supplement of an angle is three times its complement. Find the measure of the angle.