Perimeter Formulas

 Perimeter of a geometrical shape  is a total distance around a closed path or outlines around two dimensional shapes. The perimeter of a circle or an ellipse is called its circumference. Perimeter of a geometrical shape like rectangle , square and circle can be calculated by simple formulas. 

1) Rectangle 

` \text{Perimeter of rectangle = 2(length) + 2(breadth)} `

2) Square 

`\text{Perimeter of Square = 4} \times \text{sides}= 4s`

3) Triangle

`\text{Perimeter of Triangle = sum of three sides}`

`\text{Perimeter of Triangle = a+b+c}`

4) Circle

`\text{Circumference of Circle = }2\times \pi \times r ` 

`\text{Circumference of Circle = } \pi \times \text{diameter}`