Both rectangles and parallelograms are quadrilaterals, which means that they are polygons with four sides. But is a rectangle a parallelogram? Or is a parallelogram a rectangle? Here's a review of the different properties of both parallelograms and rectangles.

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

A rhombus is a quadrilateral that has:

- Four sides of equal length
- Two pairs of equal opposite angles