A quadrilateral with one pair of parallel lines would be a trapezoid. : P
It can be but it need not be.
trapezoid
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A trapezoid
A quadrilateral. It may be a rectangle, parallelogram, trapezoid, or an irregular quadrilateral.
a rectangle. It wouldn't be a square because that has 1 pair of 4 equal side but a rectangle has 2 pairs of equal sides and 4 right angles.
a trapezoid that is NOT isosceles
A trapezoid.
square
The Rectangle and the Parallelogram both have 2 pairs of parallel sides. The Trapezium has 4 sides but only 2 are a parallel pair. The Kite has 2 pairs of equal sides but none parallel. The limits is an irregular quadrilateral with no side equal or parallel to another.