A **square** is a quadrilateral with equal sides, two pairs of which are parallel, and all right angles.

- Is a square a trapezoid? Yes, because it has at least one pair of parallel sides.
- Is a square a parallelogram? Yes, because it has two pairs of parallel sides.
- Is a square a rectangle? Yes, because it has two pairs of parallel sides with all right angles.
- Is a square a rhombus? Yes, because it has equal sides, two pairs of which are parallel.