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It is a right angled parallelogram.
A rectangle is defined as "a parallelogram with one right angle" A parallelogram is defined as "a quadrilateral with opposite sides equal and parallel" This makes a rectangle a sort of second-generation quadrilateral!
All the angles being 90o. A rectangle, like a parallelogram, has two pairs of parallel sides and opposite angles equal; however a rectangle also requires that the angles are all 90o (right angles) unlike a general parallelogram.
Because it has 4 interior right angles whereas a parallelogram has 2 obtuse angle and 2 acute angles.
A quadrilateral and a rectangle are the same so.............