A square
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.
rhombus
Not all four-sided shapes have one pair of parallel sides. For example, a rectangle and a trapezoid can have one pair of parallel sides, but a general quadrilateral does not necessarily have any parallel sides. Shapes like rhombuses and squares have two pairs of parallel sides, while irregular quadrilaterals may have none. Thus, the presence of parallel sides depends on the specific type of four-sided shape.
Any polygon, other than a triangle, can have one pair of parallel sides.
A polygon with 4 or more sides can have a pair of parallel sides.
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.
trapezoids
rhombus
rectangular
Not all four-sided shapes have one pair of parallel sides. For example, a rectangle and a trapezoid can have one pair of parallel sides, but a general quadrilateral does not necessarily have any parallel sides. Shapes like rhombuses and squares have two pairs of parallel sides, while irregular quadrilaterals may have none. Thus, the presence of parallel sides depends on the specific type of four-sided shape.
Any polygon, other than a triangle, can have one pair of parallel sides.
A trapezium, or any one of irregular polygons of 5 or more sides.
trapezoidTrapezoid.
You need at least one pair of parallel sides. Most trapezoids have that.
A polygon with 4 or more sides can have a pair of parallel sides.
A shape with one or more parallel sides is called a trapezoid (or trapezium in some regions). In a trapezoid, at least one pair of opposite sides is parallel. Other shapes, like rectangles and parallelograms, also have parallel sides. These characteristics are key in distinguishing these geometric figures.
The name of the four-sided shape that has only one pair of parallel sides is known as a trapezoid. The other two sides are not parallel to each other. There are many other shapes with more than four sides that have one pair of parallel sides but these typically don't have special names. So assuming the question is only referring to four-sided figures, the answer is a trapezoid.