# Perimeter of a Triangle Calculator

Perimeter is defined as the total length of the boundary of a closed shape.

## What is the Perimeter of a Triangle Calculator?

'Cuemath's Perimeter of a Triangle Calculator' is an online tool that helps to calculate the perimeter of a triangle for a given length of the sides. Cuemath's online Perimeter of a Triangle Calculator helps you to calculate the perimeter of a triangle within a few seconds.

## How to Use Perimeter of a Triangle Calculator?

Please follow the steps below on how to use the calculator:

**Step1:**Enter the length of the sides in the given input box.**Step 2:**Click on the**"Calculate"**button to find the perimeter of a triangle**Step 3:**Click on the**"Reset"**button to clear the fields and find the perimeter of a triangle for different values.

## How to Find Perimeter of a Triangle ?

The** perimeter of the triangle** is defined as the sum of its boundary or all three sides. The formula to calculate the perimeter of the triangle is:

**The perimeter of the triangle = sum of all three sides of a triangle = a + b + c unit(s)**

Where a, b, and c are lengths of the sides of a triangle.

**Solved Example:**

Find the perimeter of a triangle when a = 4 units, b = 5 units, and c = 7 units

**Solution:**

Given: a = 3, b = 6, c = 8

The perimeter of a triangle = sum of all three sides of a triangle

= a + b + c

= 3 + 6 + 8

= 17 units

Therefore, the perimeter of a triangle is 17 units.

Similarly, you can try the calculator to find the perimeter of a triangle for the following:

- Length of the sides a = 11 units, b = 15 units, and c = 17 units
- Length of the sides a = 12 units, b = 14 units, and c = 16 units

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