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It has 6 possible pairs of sides, although all the pairs will look the same.
It has 6 possible pairs of angles, although all the pairs will look the same.
2
4
two or 2
8
Two pairs.
Four of them.
23 pairs OR 46.
66
A square has two pairs of parallel sides.It has two pairs of parallel sides.
None
forty eight
2 pairs
2 pairs, same as any other parallelogram