Acute Angle, angles are less than 900, Obtuse Angle, angles measure more than 900 degrees and less than 1800, Right Angle, measures exactly 900, Reflex Angle, angles measure more than 1800 but less than 3600, Straight Angle, measures exactly 1800 , Complete Angle/ Full Rotation, measures exactly 3600 , Parallel lines, same distance apart and never intersects, Intersecting lines, when two or more lines meet or cross each other, Perpendicular lines, lines meet or cross each other at a 900 angle.

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