To derive the area of a rectangle we use the unit squares. Area and Volume Formula for geometrical figures - square rectangle triangle polygon circle ellipse trapezoid cube sphere cylinder and cone. Since the area of a rectangle is a product of its length and width we need to find the width.
A length width a b A length width a b.
More Geometry Lessons In these lessons we have compiled. In other words the area of a rectangle is the product of its length and width. The area of a shape can be determined by placing the shape over a grid and counting the number of squares that covers the entire space. Divide the rectangle ABCD into unit squares as shown.