complementary, Angles that add to 90 degrees, supplementary, Angles that add to 180 degrees, right, An angle that is 90 degrees, acute, An angle that is less than 90 degrees, obtuse, An angle that is more than 90 degrees but less than 180 degrees, ray, Part of a line with one endpoint, angle, The name we use to describe the amount of turning between two lines, straight, An angle that is 180 degrees, vertex, The intersection point of an angle, reflex, An angle that is more than 180 degrees and less than 360 degrees, revolution, Angles in a ________________ add to 360 degrees, degree, The unit of measurement which we use to measure angles.

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