## Introduction

Since you already have the basic knowledge regarding perimeter and area of squares and rectangles. This topic will focus on the perimeter and area of other plane figures.

Let us again define what perimeter and area are.

Perimeter is the shortest distance around a closed figure while area is the space occupied by it. Unit for perimeter is the same as the unit for length.

## Here is the formula to solve for the perimeter and area of some plane figures.

## Square

Perimeter of a square = 4 × side

Area of square = side × side

Rectangle

Perimeter of a rectangle = 2 × (Length + Breadth)

Area of a rectangle = Length × Breadth

Parallelogram

Area of a parallelogram = base × height

Triangle

Area of a triangle = 1/2 × base × height

Circle

Area of a circle = πr^{2} , where ‘r’ is the radius of the circle

Circumference = πd, where ‘d’ is the diameter and π = 22/ 7 or 3.14