2
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 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