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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