parrallelogram and quadrilateral
Such a parallelogram is a rectangle.
There is no reason because the premise is false: a parallelogram is not a rectangle.
A parallelogram with 4 right angles is a rectangle.
Except for the special case of a rectangle, a parallelogram must have two acute angles.
A square is a rectangle and a rectangle is a parallelogram and a parrallelogram.
parrallelogram
A parallelogram with a right angle is a rectangle.
parrallelogram and quadrilateral
Such a parallelogram is a rectangle.
A rectangle has four 90-degree angles.
There is no reason because the premise is false: a parallelogram is not a rectangle.
A parallelogram with 4 right angles is a rectangle.
Yes, a rectangle is a special case of a parallelogram, where each of the 4 angles = 90°
There is a Kite,Trapeziod Parrallelogram,Rhombus,Square, Rectangle
Except for the special case of a rectangle, a parallelogram must have two acute angles.
Except for the special case of a rectangle, a parallelogram must have two obtuse angles.