They all have 4 sides or edges and 4 vertices or corners.
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Two sides of a quadrilateral can be parallel.
it depends on the other diffrent properties of the shape * * * * * A quadrilateral. If you have more information about the properties of the shape, there may be a more precise name, but a quadrilateral is the general name.
A cyclic quadrilateral is one that has concyclic vertices (its corners all fit on the same circle) and, for a simple cyclic quadrilateral, opposite angles are supplementary.
A rectangle is a special kind of quadrilateral that has four right angles and opposite sides that are equal and parallel.
The essential properties are that a rectangle is a quadrilateral whose sides met at right angles. There are many other properties but all of them follow from this.