It is possible for a hexagon to have one pair of parallel sides. A hexagon can have 0, 1, 2 or 3 pairs of parallel sides, and can have 0, 2, 3, 4, 5, or 6 parallel sides.
a hexagon
Three pairs: all six sides are members of a parallel pair.
A square.
A hexagon with only one pair of parellel sides
It is possible for a hexagon to have one pair of parallel sides. A hexagon can have 0, 1, 2 or 3 pairs of parallel sides, and can have 0, 2, 3, 4, 5, or 6 parallel sides.
a pentagon
a hexagon
A hexagon can have 0, 1, 2 or 3 pairs of parallel sides. A regular hexagon has 3 pairs of parallel sides. A hexagon can also have 2 sets of 3 parallel sides! If you are allowed to count sides in more than one pair, this would be 6 pairs of parallel sides!
Three pairs: all six sides are members of a parallel pair.
An irregular hexagon.
A square.
There is no specific name. For example, if you number the sides of a regular hexagon sequentially from 1 to 6, then sides 1 and 3 are not parallel but there is no specific name for that pair. In the context of the hexagon they do not meet - even if they do so way outside the hexagon. If they do meet up in the context of the shape, then they will be adjacent or intersecting sides.
A hexagon with only one pair of parellel sides
cuz it has 6 sides and each opposite pair will never meet each other when drawn longer.
One pair? If it is one pair of parallel sides, then it is a trapezoid. If it has 2 pairs of parallel sides, then it is a parallelogram.
An isosceles trapezoid must have a pair of parallel sides and a pair of congruent sides