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.
A square or a rectangle has perpendicular sides that meet each other at right angles which is 90 degrees.
There are infinitely many possible answers. For example, any regular polygon with an even number of sides.
The question contradicts itself. A dodecagon need not have any perpendicular sides.
shape no pairs of perpendicular sides
I suppose. All of a square's sides are perpendicular.
No but its diagonals are perpendicular
No not normally
The only requirement for a trapezoid is that one pair of opposite sides be parallel. There could be trapezoids with a pair of perpendicular lines.
A right angle has one pair of perpendicular sides.
Square, rectangle and ovals.
Put 2 lines on the perpendicular sides and put 1 line for the parallel sides