I suppose. All of a square's sides are perpendicular.
Any shape, other than a triangle can have a pair of perpendicular sides.
The question contradicts itself. A dodecagon need not have any perpendicular sides.
shape no pairs of perpendicular sides
It could be a right angle triangle
Any polygon can have only 1 pair of perpendicular sides.
Yes it does. Do you even know what perpendicular means? It means that two sides can keep going but never touch. If you look at a prism depending on what prism it is it should have at least one pair of perpendicular sides.