None, since there is no such thing.
But a hexagon has 6 sides, so two disjoint ones would have 12.
There are 12 triangles in 2 hexigons
A 6 sided prism
There are two sides , the inside and the outside !
there are only two sides.
Two sides and no edges!
Two pairs of equal sides.
Two sides
A parallelogram has two pairs of parallel sides.
Two
A cylinder has two sides - an inside and an outside
Two pairs of equal sides.
None or two sides.