A quadrilateral with only one pair of equal sides is called a trapezoid (or trapezium in some countries). In this shape, one pair of opposite sides is parallel, while the other pair can be of different lengths. The presence of only one pair of equal sides distinguishes it from other quadrilaterals like parallelograms or isosceles trapezoids, which have more symmetrical properties.
A trapezoid
A quadrilateral has four sides that may or may not be equal or parallel If two sides are parallel and the other sides equal but not parallel it is a trapezoid
A trapezium.
paralellogram
A quadrilateral that has only one pair of parallel sides (the other pair not parallel) is a trapezium.
A trapezoid
A quadrilateral has four sides that may or may not be equal or parallel If two sides are parallel and the other sides equal but not parallel it is a trapezoid
A trapezoid.
A trapezium.
paralellogram
A trapezoid (trapezium) has only 2 sides parallel and not all angles equal
A quadrilateral that has only one pair of parallel sides (the other pair not parallel) is a trapezium.
An isosceles trapezium.
An isosceles trapezium.
isoisole trapzoid
That quadrilateral is known as a 'parallelogram'.
A kite has two pairs of equal sides with no parallel sides.