point, a dot, ray, part of a line that has an endpoint and extends on the other side, line, extends on both sides, angle, formed by joining two rays, segment, part of a line that has two endpoints, degree, measurement of an angle, parallel, lines that will never meet, intersecting, lines that cross at a point, perpendicular, lines that form a right angle, obtuse, angles greater than 90o but less than 180o, straight, angles that are exactly 180o, right, angles that are exactly 90o, acute, angles that are less than 90o.

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