The first geometric shape that comes to mind with no perpendicular sides is a triangle.
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.
There are infinitely many possible answers. For example, any regular polygon with an even number of sides.
shape no pairs of perpendicular sides
Any polygon can have only 1 pair of perpendicular sides.
I suppose. All of a square's sides are perpendicular.
No but its diagonals are perpendicular
No not normally
A right angle has one pair of perpendicular sides.