line - has arrows, it can be extended, ray - has a starting point, and can be extended, line segment - has a starting and end point, acute angle - the angle measures smaller than 90 degrees, right angle - the angle measures exactly 90 degrees, obtuse angle - the angle measures MORE than 90 degrees, point - every shape begins with this, plane surface - flat surface, protractor - tool for measuring angles, parallel - lines that never intersect or meet, intersecting lines - lines that will touch, perpendicular lines - lines that meet and form 90 degree angles, angles in a circle - circles can be divided into angles, geometry - the study of shapes, shapes - any 2 dimensional figure,

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