Point - an exact location in space, Line - a straight path of points that goes on without end in both directions, Line segment - a par of a line that includes two endpoints and all the points between them, Ray - a part of a line that has one endpoint and goes on without end in one direction , Right angle - exactly 90 degrees, Straight angle - exactly 180 degrees, Acute angle - less than 90 degrees, Obtuse angle - more than 90 degrees, Parallel lines - lines that never intersect(touch), Perpendicular lines - lines that intersect to form right angle s,

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