# Perimeter of triangle calculator

# Perimeter of triangle calculator

**To calculate the perimeter of a triangle, you need to add up the lengths of all its three sides. Here’s how you can use a calculator to find the perimeter of a triangle:**

- Measure the length of one of the sides of the triangle.
- Write down the length of the side.
- Measure the length of the second side of the triangle.
- Write down the length of the second side.
- Measure the length of the third side of the triangle.
- Write down the length of the third side.
- Add up the lengths of all three sides.
- The result is the perimeter of the triangle.

Alternatively, you can use the following formula to calculate the perimeter of a triangle:

**Perimeter = Side 1 + Side 2 + Side 3**

Here’s an example to illustrate the process:

Suppose you have a triangle with sides of length 5 meters, 7 meters, and 8 meters.

**To find the perimeter of this triangle, you would follow these steps:**

- Measure the length of one of the sides: 5 meters.
- Write down the length of the side: 5 meters.
- Measure the length of the second side: 7 meters.
- Write down the length of the second side: 7 meters.
- Measure the length of the third side: 8 meters.
- Write down the length of the third side: 8 meters.
- Add up the lengths of all three sides: 5 + 7 + 8 = 20 meters.
- The perimeter of the triangle is 20 meters.