A square and a rectangle because their corners meet at 90 degrees
I suppose. All of a square's sides are perpendicular.
Yes.
trapazoid
[object Object]
Any shape, other than a triangle can have a pair of perpendicular sides.
trapezoid
a trapazoid
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.
The question contradicts itself. A dodecagon need not have any perpendicular sides.
It could be a right angle triangle
A trapezoid is defined as a four-sided figure (quadrilateral) with at least one pair of parallel sides. The other pair of sides can be either parallel or non-parallel, and they are not necessarily perpendicular. In some cases, a trapezoid may have perpendicular sides, but this is not a requirement for its classification.
shape no pairs of perpendicular sides