One pair.
A square has two pairs of parallel sides.It has two pairs of parallel sides.
It has 2 pairs of parallel sides
A parallelogram has two pairs of parallel sides.
2There are two parallel sides....A rhombus has two pairs of opposite parallel sides.There are two parallel sides....A rhombus has two pairs of opposite parallel sides.
All parallelograms have two pairs of parallel sides.
A parallelogram has 2 pairs of parallel sides
A parallelogram has two pairs of opposite parallel sides
Two pairs of opposite sides are parallel in a parallelogram
It has 2 pairs of parallel sides
A triangle has no parallel sides.
a pentagon has no parallel sides
A regular hexagon has 6 parallel sides (3 pairs)