The quadrilaterals with exactly one pair of parallel sides are:
1. Trapezoid: A quadrilateral with one pair of parallel sides. The other two sides are nonparallel.
2. Isosceles trapezoid: A quadrilateral with one pair of parallel sides and both pairs of opposite sides equal in length.
3. Parallelogram: A quadrilateral with both pairs of opposite sides parallel and equal in length.
4. Rhombus: A parallelogram with all four sides equal in length.
5. Rectangle: A parallelogram with all four angles equal to 90 degrees.
Note: A square can also be included in this list as a special case of rectangle and rhombus where all sides are equal in length and all angles are right angles.
List all of the quadrilaterals with exactly one pair of parallel sides.
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