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A quadrilateral is a figure with 4 sides. Since a rectangle has four sides, it is a quadrilateral.
square
quadrilateral
A square or a rectangle
rectangle
quadrilateral
A quadrilateral is a polygon with four sides. A rectangle is a quadrilateral
Yes. A square is a rectangle and a rectangle is a quadrilateral.
Rectangle
That is called a rectangle.
A rectangle is a quadrilateral with two pairs of parallel sides. That defines a parallelogram.
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.