A quadrilateral is a closed plane (2-dimensional) shape bounded by four straight lines that meet at four vertices.
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All kites are quadrilaterals, but quadrilaterals are not kites.
All parallelograms are quadrilaterals but all quadrilaterals are not necessarily parallelograms
All quadrilaterals have 4 sides
quadrilaterals only have for sides and polygons have 5-6
All 4 sided parallelograms are quadrilaterals.