A diamond has two pairs of parallel lines.
A rhombus has 2 pairs of parallel lines.
A regular dodecagon has six pairs of parallel lines.
it has 2 pairs of parallel lines
it has too parallel lines!
A pentagon has no parallel lines.
A regular octagon has four pairs of parallel lines.
A square has 2 pairs of equal opposite parallel lines
A parallelogram is, conventionally, a four sided figure with two sets of parallel sides and four interior angles. Some people argue that hexagons (with three pairs of parallel lines), octagons (4 pairs) and, generally, 2n-gons with n pairs of parallel sides should also be considered parallelograms.
A parallelogram has 2 pairs of parallel lines
A square has 2 pairs of parallel lines and they all are the same lenght
2 pairs of parallel lines