rectangles,rhombus,and a square
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Not necessarily. All parallelograms are quadrilaterals but not all quadrilaterals are parallelograms. Parallelograms are more specific instances of quadrilaterals. Its like saying all squares are rectangles but not all rectangles are squares.
They are quadrilaterals which have two pairs of parallel sides.
All parallelograms are in the class of 4 sided quadrilaterals.
Squares, parallelograms, rhombuses, and trapezoids are quadrilaterals that are not rectangles.
Quadrilaterals are called parallelograms ONLY if both pairs of opposite sides are equal and parallel to each other.