Right - An angle whose measure is 90 degrees, Acute - An angle whose measure is less than 90 degrees, Obtuse - Angle whose measure is greater than 90 degrees, Straight - Angle whose measure is 180 degrees, Angle - A figure formed by two rays with a common endpoint, Complementary - Angles whose sum is 90 degrees, Supplementary - Angles whose sum is 180 degrees, LinearPair - Angles that are adjacent and supplementary, Adjacent - Two angles that share a side and vertex, Vertex - The point where the sides of an angle meet, Sides - The rays that form the boundaries of an angle,

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