Great geometry primer on perimeter and area. The gray space is the area of the parallelogram in the diagram below. Since the calculation involves a square root you will probably need a calculator.
The area of a parallelogram is the space contained within its perimeter.
A rectangle is a figureshape with opposite sides equal and all angles equal to 90 degrees. Area and Perimeter Formulas For all Shapes. Well start with the area and perimeter of rectangles. Perimeter Area formulas of Quadrilateral.