When all the vertices of a plane quadrilateral are exactly equal to 90 degrees it is is called a rectangle and, if all its sides are of equal length, that rectangle is called a square.
So when a plane quadrilateral has all its vertices exactly equal to 90 degrees, but it does not have all its sides equal in length, it must be a rectangle but not a square.
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Yes. A square is a rectangle and a rectangle is a quadrilateral.
A rectangle is a quadrilateral with four right angles True (Apex)
It is a square
No, a square is an equilateral quadrilateral. http://en.wikipedia.org/wiki/Quadrilateral
Parallelogram quadrilateral trapezoid rectangle square