a triangle, or pentagon.
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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.
it's a trapezoid
It looks like its the heading on an exercise and it means for the given polygons name them. The polygons will either be pictures or descriptions (like "it has four equal sides and two pairs of parallel sides").
There is no mathematical limit to the number of sides that a polygon can have. As the number of sides increases the polygon will become more and more like a closed curve - a regular polygon will become like a circle. The size of the polygon and accuracy of measurement will determine when it is no longer possible to distinguish between the polygon and the curve. Nevertheless, the two shapes will be mathematically different objects.
If the polygon is also a quadrilateral (4 sided polygon) then the answer is trapezoid. But there are many multi-sided polygons that could have a pair of opposite parallel sides - hexagon for example or consider the following pentagon: /\ | | -- That was difficult, but you get the idea. It looks like a house.