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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.

Q: When is a quadrilateral 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

Related questions

Yes. A square is a rectangle and a rectangle is a quadrilateral.

a quadrilateral is a square, rectangle, rhombus, parallelogram, and trapezoid.

Sure, a square is a rectangle and the diagonals of a square are perpendicular.

A rectangle is a quadrilateral with four right angles True (Apex)

That is, a quadrilateral with no square corners is not a rectangle or a square. This is because by definition, a rectangle and a square have four square corners, so if a quadrilateral has no square corners, then it cannot be a rectangle or a square.

Yes, it is a square. It can also be a rectangle.

Not a quadrilateral. But "Yes" to a rhombus and a rectangle. And, since a square is a rectangle as well as a rhombus, a square as well.

Square and Rectangle

It is a square

Quadrilateral?

Quadrilateral?

square, rectangle, quadrilateral, polygon, parallelogram, equilateral