A trapezoid has exactly one pair of parallel lines
a trapizoid
A trapezoid.
A trapezoid
trapezoid
It is a trapezoid that has one pair of opposite parallel sides of different lengths.
a trapizoid
A trapezoid.
A trapezoid
trapezoid
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.
Then, the opposite sides are congruent.