1?
Yes
It can have one or two.
It has parallel sides, but not perpendicular.
Mutually perpendicular, adjacent sides.Mutually perpendicular, adjacent sides.Mutually perpendicular, adjacent sides.Mutually perpendicular, adjacent sides.
A regular pentagon has zero perpendicular sides. If it is irregular, it could have as many as 2 or 4 perpendicular sides.
Parallel sides do not intersect. Perpendicular sides intersect at a right angle.
It can have one or two.
Square & Rectangle are the only two. Rhombus (diamond) & parallelogram have adjacent sides, but no 90 degree angles (not perpendicular).
It has parallel sides, but not perpendicular.
Mutually perpendicular, adjacent sides.Mutually perpendicular, adjacent sides.Mutually perpendicular, adjacent sides.Mutually perpendicular, adjacent sides.
Adjacent sides are perpendicular. Opposite sides are parallel.
shape no pairs of perpendicular sides
No sides perpendicular means no right angles. A rhombus is a quadrilateral with no right angles so no sides perpendicular.
The question contradicts itself. A dodecagon need not have any perpendicular sides.
No. a equilateral triangle does not have perpendicular sides.
No. a equilateral triangle does not have perpendicular sides.
A rectangle always has perpendicular sides.
A regular pentagon has zero perpendicular sides. If it is irregular, it could have as many as 2 or 4 perpendicular sides.