None
One pair.
Just one. And the other pair cannot be parallel.
A square has four pairs of parallel lines. Each pair consists of two opposite sides that run parallel to each other, resulting in a total of two pairs for the horizontal sides and two pairs for the vertical sides. Thus, the total is four pairs of parallel lines.
Two pairs.
None
Two pairs.
2 pairs
2 pairs
2 pairs, same as any other parallelogram
none.
1 pair of parallel line
The NEVER cross each other