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No , a parallelogram can not have a 90 Degree angle .Reason : A Parallelogram can be defined as a quadrilateral whose two s sides are parallel to each other and all the four angles at the vertices are not 90 degrees or right angles, then the quadrilateral is called a parallelogram.
A parallelogram is a quadrilateral whose opposite sides are parallel and has no right angles
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It is a right angle, or an angle whose measure is 90 degrees or pi/2 radians.
Less than 90 degrees is an acute angle, a 90 degree angle is a right angle, and an angle greater than 90 degrees is called an obtuse angle.