The Perimeter of a Triangle Calculator is a free online tool that displays the perimeter of a triangle when the side values are given. CoolGyan online perimeter of a triangle calculator tool performs the calculation faster, and it displays the perimeter of a triangle in a fraction of seconds.

## How to Use the Perimeter of a Triangle Calculator?

The procedure to use the perimeter of a triangle calculator is as follows:

**Step 1:** Enter the side values of a triangle in the input field

**Step 2:** Now click the button ”Calculate” to get the perimeter value

**Step 3:** Finally, the perimeter of a triangle will be displayed in the output field

### What is Meant by the Perimeter of a Triangle?

In Geometry, a triangle is a closed two-dimensional figure with three sides, three vertices and three angles. Based on the number of sides and angles, the triangle can be classified into different types. The area of a triangle is the region occupied by the shape triangle. The perimeter of a triangle is the length of the complete boundary of a triangle. In other words, the perimeter of a triangle is the sum of all the sides of a triangle. If a, b, and c are the sides of a triangle, then the perimeter of a triangle is given by the formula:

**Perimeter of a triangle = a+b+c units**

For example, the sides of a triangle are 3 cm, 4 cm and 5 cm, then the perimeter of a triangle is calculated as:

Perimeter = 3+4+5 cm

Perimeter = 12 cm.