polygon - a shape with straight sides that is closed, quadrilateral - a polygon with 4 sides, rhombus - a quadrilateral with equal sides, parallelogram - a quadrilateral with 2 pairs of parallel sides, trapezoid - a quadrilateral with one pair of parallel sides, attribute - a trait of a shape (number of sides, shape, size), square - a quadrilateral with 4 equal sides, triangle - a polygon with 3 sides, right angle - the corner of a square or rectangle,

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