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8 pairs means 16 equal sides so it is at least a hexagon.
what shape has 4 right angles and 2 pairs of equal sides?
A square has 4 right angles, and 2 pairs of equal, perpendicular sides.
This is a parallelogram, opposite sides are of equal length and opposite angles are equal in size.
A shape that has 2 pairs of equal sides and no right angles is a kite or a parallelogram. In a parallelogram, each side is equal to the one directly opposite; in a kite, the equal sides are adjacent to one another.
A rectangle or a square
A rectangle or oblong