What is the difference between a quadrilateral and a parallelogram?

Solution:

As the name suggests, a quadrilateral is a polygon that has 4 sides.

While on the other hand, a parallelogram is a special quadrilateral in which both pairs of opposite sides are parallel and equal.

A parallelogram is a special type of quadrilateral.

A parallelogram is defined as a quadrilateral in which both pairs of opposite sides are parallel and equal.

So, all parallelograms fall under the category of quadrilaterals, but all quadrilaterals can not be named as parallelograms. 

Thus, All parallelograms are quadrilateral, but all quadrilaterals can not be named as parallelograms.

What is the difference between a quadrilateral and a parallelogram?

Summary:

All parallelograms fall under the category of quadrilaterals, but all quadrilaterals can not be named as parallelograms.