A rectangle is a quadrilateral with 4 sides and 4 right angles. A square is a special form of rectangle, and it meets that criterion. But it is also equilateral, meaning its sides are all the same length (are all equal). It is a rectangle or a square. A square is a special type of rectangle with all sides having equal length. Here is a a nice chart showing the quadralaterals. http://content.answers.com/main/content/wp/en/f/f1/Quadrilateral_hierarchy.png
A quadrilateral where each angle is a right angle is known as an oblong.
It is a square or a rectangle where each interior angle is a right angle of 90 degrees.
A rectangle, or could be a square if lengths are the same.
A regular quadrilateral is a square and each angle is 90 degrees (i.e. a right angle).
A quadrilateral can have four right angles.
Quadrilateral means four sides. Four right angles and four sides is a rectangle and if the sides are equal length it is a square.
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?