Polygon - A closed figure with no round sides, Trapezoid - A quadrilateral with only one pair of parallel sides, Line of Symmetry - A line that divides in half to make a mirrored image, Right Angle - Exactly 90º, Obtuse Angle - Between 91ºand 179º, Acute Angle - Between 1ºand 89º, Intersecting Lines - Lines that cross and make the letter V, Line Segment - A line that has a start and a stopping point, Line - A line with two arrows on each end. Goes on forever., Perpendicular Lines - Lines that intersect at a 90º angle, Parallel Lines - Lines that never touch, Ray - A point that ends in a line. A sun and its ray, Straight Angle - Exactly 180º, Protractor - A tool used to measure angles, Paralellogram - A quadrilateral with all sides parallel, Rhombus - A parallelogram with all four sides congruent , Rectangle - 4 sided polygon with 4 right angles. Opposite sides are parallel and congruent, Square - 4 sided polygon with 4 right angles. ALL sides are the same, Right Trapezoid - A quadrilateral with only one pair of parallel sides and a right angle, Quadrilateral - A polygon with 4 sides,

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