# Perimeter of Triangle – Definition, Formula & Examples

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The perimeter of any 2D figure is defined as the distance around the figure. You can find the perimeter of any plane figure (2D shape) by adding the length of each side of the figure. Since the perimeter of any figure is a linear measurement, it is expressed in terms of unit, such as mm, cm, m, ft, yd, in, etc.

Let’s learn what is the perimeter of triangle and how it is calculated.

## What is the Perimeter of Triangle? – Perimeter of Triangle Formula

The perimeter of a triangle is the total length of all three sides of a triangle. Thus, the perimeter of a triangle is obtained by adding the length of the three sides of a triangle. Since the perimeter is a linear measure, therefore, the unit of the perimeter of a rectangle will be in metre, centimetre, inch, feet, etc.

## Conclusion

The perimeter of a triangle is the length of the boundary formed by the three sides of a triangle. The perimeter of a triangle is calculated by finding the sum of the three sides of a triangle.