Yes. The top and bottom lines of a trapezoid are parallel.
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A quadrilateral must have one and only one set of a parallel sides to be a trapezoid.
It is a trapezoid that has one set of opposite parallel lines of different lengths.
A trapezoid is unique because it is a quadrilateral that has one set of parallel sides, and one set that is not parallel.
That would be a right trapezoid.
A trapezoid is a quadrilateral with a set of parallel lines. Because it is a quadrilateral, it has four angles.