It is not possible to have 1 parallel side since it must be parallel to another side.
A four sided shape with 1 PAIR of parallel sides is a trapezium (or trapezoid).
Chat with our AI personalities
the shape has 1 side of symmetry
A trapezoid which is also called a trapezium depending where you live.
A shape cannot have only one side because it would not be closed. A shape must have at least three sides to be a closed figure (no "gaps")
a Hecatommyriagon
Trapezium