point - an exact location in space, line segment - part of a line with 2 endpoints, ray - part of a line that has one endpoint and continues on forever in one direction, right angle - an angle that forms a square corner; an angle that is 90° , acute angle - open less than a right angle; any angle less than 90° , obtuse angle - an angle that is more than a right angle, but less than a straight angle; any angle that is more than 90° but less than 180° , straight angle - an angle that forms a straight line; an angle that is 180° ,

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