Equilateral Triangle, A Triangle with all sides are equal, Isosceles Triangle, A Triangle with 2 equal sides, Scalene Triangle, A Triangle with no sides are equal, Acute Angles, An angle that is less than 90°, Right Angles, An angle that is exactly 90°, Obtuse Angles, An angle that is greater than 90°, Line, A line that goes on forever in both directions, Line Segment, A line that has an endpoint on both ends., Ray, A Line that starts at one point and goes on forever in one direction, Parallel Lines, Lines that never meet, and are always the same distance apart, Perpendicular Lines, Lines that intersect to form right angles (90°), Intersecting Lines, Lines that intersect, but do not form right angles

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