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A rectangle is a parallelogram in which all four vertex angles equal 90°.
Yes, a rectangle can be a parallelogram. A rectangle is a type of parallelogram with all angles equal to 90 degrees. Additionally, opposite sides of a rectangle are equal in length. Therefore, all rectangles meet the definition of a parallelogram, but not all parallelograms are rectangles.
Any parallelogram is also a quadrilateral.A rhombus is a parallelogram with all its sides of equal length.A rectangle is a parallelogram with each of its vertex angles equal to 90°.A square is a rectangle (and thus a parallelogram) with all its sides of equal length.
A rectangle has two sets of two opposite sides of equal length - as does a parallelogram.
A rectangle cannot be a parallelogram because a parallelogram has opposite sides that are parallel and equal in length, while a rectangle has all angles equal to 90 degrees. Thus, a rectangle is a specific type of parallelogram that has the additional property of having all angles equal to 90 degrees.