A trapezoid
a trapizoid
A trapezoid has exactly one pair of parallel lines
trapezoid
It is a trapezoid that has one pair of opposite parallel sides of different lengths.
A trapezoid
a trapizoid
A trapezoid has exactly one pair of parallel lines
trapezoid
This quadrilateral is a trapezoid. In a trapezoid, one pair of opposite sides is parallel, and one pair of opposite sides is congruent. The other two sides are not parallel or congruent.
The Opposite Sides Parallel and Congruent Theorem states that if a quadrilateral has a pair of opposite sides that are parallel and congruent, then the quadrilateral is a parallelogram.
That's a trapezoid (or 'trapezium').
It is a trapezoid that has one pair of opposite parallel sides of different lengths.
It is a trapezoid which has 1 pair of opposite parallel sides of different lengths
It is a quadrilateral with exactly 2 pairs of parallel sides.
If it doesn't have parallel sides, it's just classified as a quadrilateral.
I would be seriously concerned if a quadrilateral had more than two pairs of opposite sides parallel! A quadrilateral with two pairs of opposite sides parallel is a parallelogram.