A quadrilateral with only one pair of parallel lines is called a trapezoid.
A trapezium is a quadrilateral with two parallel lines.
A trapezoid is a quadrilateral with exactly two parallel sides.
A trapezoid
A trapezoid has exactly one pair of parallel lines
There are two definitions for trapezoids. One defines them as a quadrilateral with at least two parallel lines, which would include parallelograms. The other strictly defines trapezoids as quadrilaterals with exactly two parallel lines.
trapezoid
A parallelogram.
Parallelogram
Trapezium
Any quadrilateral with two sets of parallel sides is called a parallelogram.
A kite is a 4 sided quadrilateral that has no parallel sides