They are equal and parallel.
Equal and parallel
rectangle
It is not possible for a quadrilateral in Euclidean plane geometry to have no equal angles and still have its opposite sides parallel.It's possible for a quadrilateral to have no equal angles and two of its sides parallel (opposite ones, obviously; adjacent sides can't possibly be parallel). That would be a trapezoid.
A square and a rhombus both have all sides equal and opposite sides parallel.
They are equal and parallel.
Equal and parallel
A quadrilateral with opposite sides equal and parallel
rectangle
It is not possible for a quadrilateral in Euclidean plane geometry to have no equal angles and still have its opposite sides parallel.It's possible for a quadrilateral to have no equal angles and two of its sides parallel (opposite ones, obviously; adjacent sides can't possibly be parallel). That would be a trapezoid.
A square and a rhombus both have all sides equal and opposite sides parallel.
That quadrilateral is known as a 'parallelogram'.
A Rectangle
A parallelogram.
A parallelogram.
A square or a rectangle
rhombus. The rhombus is a quadrilateral with all sides equal in length. It is also a parallelogram, so opposite sides are parallel and equal in length, and opposite angles are equal.