polygon, a shape with 3 or more straight sides that is closed, quadrilateral, a polygon with 4 sides, rhombus, a quadrilateral with 4 equal sides, parallelogram, a quadrilateral with 2 sets of parallel sides, trapezoid, a quadrilateral with one set 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, congruent, same size, same shape, parallel lines, lines that will never touch, perpendicular lines, lines that cross right in the middle, cylinder, cone, rectangular prism, square pyramid, sphere, hexagonal prism

3rd grade Geometry

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