Parallel lines, Lines that never touch and are always the same distance apart, Perpendicular lines, Lines that intersect at a right angle, Congruent lines, Equal lines, Acute Angle, Angle less than 90 degrees, Obtuse Angle, Angle Larger than 90 degrees, Right Angle, 90 degrees angle, Reflex Angle, Angle Larger than 180 degrees, Straight Angle, 180 degrees angle, Quadrilateral, A four sided shape that is 2-D, Polygon, Any 2-D shape with straight lines, Rhombi, The plural of a rhombus, Trapezium, Is a quadrilateral but is not a parallelogram, Square, All sides are congruent and has 4 right angles, Rectangle, Sides are not congruent but has 4 right angles

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