Polygon - A closed shape with straight sides., Right Angle - An angle that measures exactly 90 degrees., Quadrilateral - A polygon with four sides., Pentagon - A polygon with five sides., Hexagon - A polygon with six sides, Heptagon - A polygon with seven sides., Octagon - A polygon with eight sides, Nonagon - A polygon with nine sides, Decagon - A polygon with ten sides, Corner - The point where two sides meet; also called a vertex., Side - A straight line that forms part of a shape., Parallel - Two lines that never meet and are always the same distance apart., Angle - The space between two intersecting lines, Square - A quadrilateral with four equal sides and four right angles., Trapezoid: - A quadrilateral with at least one pair of parallel sides., Rhombus - A quadrilateral with all sides equal in length., Triangle - A polygon with three sides,

Geometry

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