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Is parallelogram a rectangle? Can you call a rectangle a parallelogram?

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Rectangles, parallelograms and all special quadrilaterals have certain properties.

A parallelogram is a quadrilateral that has:
– Two pairs of parallel sides
– Two pairs of opposite sides that are congruent

A rectangle is a quadrilateral that has:
– Four right angles
– Two pairs of opposite sides that are congruent

Final answer:
A parallelogram is not always a rectangle. A parallelogram is called a rectangle if all four angles measure .
A rectangle can always be called a parallelogram.

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