The area of a rectangle is the product of its two adjacent sides . Area of a rectangle = Length × Width . Perimeter: The perimeter of a rectangle is the sum of the length of its four sides. Since parallel sides of a rectangle have the same length, the formula for the perimeter of a rectangle is. Perimeter of a rectangle = Length + Width ... We are told that the formula for finding the perimeter of a rectangle is P is equal to 2l plus 2w, where P is the perimeter, l is the length, and w is the width. And just to visualize what they're saying, and you might already be familiar with this, let me draw a rectangle. That looks like a rectangle.

Area and Perimeter Examples. Here are some solved examples based on the formulas of the area as well as perimeter of different shapes. Example 1: If the radius of a circle is 21cm. Find its area and circumference. Solution: Given, radius = 21cm. Therefore, Area = π × r 2. A = 22/7 × 21 × 21. A = 1386 sq.cm. Circumference, C = 2πr