Some parallelograms could be quadrilaterals but all parallelograms are polygons
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A quadrilateral is a polygon with four sides. A parallelogram is a quadrilateral in which the opposite sides are parallel.
a quadrilateral trapezoidA polygon with four unequal sides is a quadrilateral, as is a square, rectangle, trapezoid and parallelogram.
Polygon, Quadrilateral, parallelogram, rhombus, trapezoid, square.
parallelogram square rectangle quadrilateral polygon plane figure
A quadrilateral, a parallelogram, a rhombus, a rectangle, a regular polygon.