How many pairs of parallel sides does a rectangle have?

A rectangle is a four sided-polygon, which has equal opposite sides and 4 interior right angles.

Answer: A rectangle has 2 pairs of parallel sides.

In a rectangle, the two lines forming a pair of parallel sides are also congruent, unlike a parallelogram.

Explanation:

Just like a square, a rectangle has 4 sides at right angles forming 2 pairs of parallel sides.

Hence, a rectangle has 2 pairs of parallel sides.