A circle intersected by a pair of parallel lines.
A polygon with 4 or more sides can have a pair of parallel sides.
quadrilateral
polygon
The number of pairs of parallel sides in a polygon varies depending on the type of polygon. For example, a rectangle has two pairs of parallel sides, while a trapezoid has one pair. Regular polygons, like a hexagon, typically do not have any pairs of parallel sides. Therefore, the total can range from zero to multiple pairs, depending on the specific polygon in question.
A trapezoid is not considered a regular polygon because a regular polygon requires all sides and angles to be equal. In contrast, a trapezoid has only one pair of parallel sides, and its other sides and angles can vary in length and measure. Therefore, the lack of uniformity in a trapezoid's dimensions prevents it from meeting the criteria of a regular polygon.
Any regular polygon of 2n sides where n>2.
A polygon with 4 or more sides can have a pair of parallel sides.
quadrilateral
polygon
A kite for example.
The number of pairs of parallel sides in a polygon varies depending on the type of polygon. For example, a rectangle has two pairs of parallel sides, while a trapezoid has one pair. Regular polygons, like a hexagon, typically do not have any pairs of parallel sides. Therefore, the total can range from zero to multiple pairs, depending on the specific polygon in question.
rhombus
It is a deltoid or a kite.
Trapezoid
Any polygon with four or more sides can have a pair of parallel sides. It is also possible to to have non-polygonal shapes - eg a cigar-shape - that has parallel sides.
Any plane polygon having four or more sides may have one pair of parallel sides.
A parallogram has two pairs of parallel sides. A trapezoid has one pair of parallel sides. A regular octagon has four pairs of parallel sides. An irregular octagon may have from 3 pair to no pair of parallel sides.