That is called a rectangle.
A rectangle or a square.
a square or a rectangle
It is a square or a rectangle where each interior angle is a right angle of 90 degrees.
A square or a rectangle
A quadrilateral with all right angles is a rectangle.
A rectangle, or perhaps a square.
A square or a rectangle
rectangle
A rectangle, or could be a square if lengths are the same.
Either a square or a rectangle
a quadrilateral with no right angle is?