Any conic section.
The only polygon that absolutely positively never has any parallel sides is a triangle. Any other shape comprised of four or more straight line segments could have one or more pairs that are parallel.
For a shape to have parallel sides it needs at least 4 sides
no...beacuse a parallelogram has to have parallel sides....a triangle can never have parallel sides
It could be an irregular polygon with 6 or more sides or, if a quadrilateral, it could be a parallelogram.
A 25-sided shape would have no parallel sides !
A rectangle is a shape that has four sides with two parallel lines.
If it has four equal sides, then two parallel sides implies two PAIRS of parallel sides. The shape is a rhombus.
A circle does not have any pairs of parallel sides. In geometry, parallel sides are defined as sides that are always the same distance apart and will never intersect. Since a circle is a curved shape with no straight sides, it does not have any pairs of parallel sides.
It could be a trapezoid
Any polygon with four or more sides can have parallel sides.
It could be an irregular polygon with 6 or more sides or, if a quadrilateral, it could be a parallelogram.