Answer
A Parallelogram with four right angles without all sides of equal length is called a Rectangle.
Work Step by Step
A Parallelogram is a special type of polygon with four sides with opposites sides parallel and is of equal length. Also, the opposite angles of a parallelogram are of equal measure.
In parallelogram, if one angle is aright angle, then every other angle must be aright angle.
The diagonals of a parallelogram intersect each other.A parallelogram is classified according to the sides and measure of the angle. For example, if all the angles of a parallelogram are aright angle and all sides of a parallelogram are not equal in length, then it is called a rectangle.
If all the sides are equal without having any right angles, then it is called rhombus.