Formula for the Perimeter of a Triangle

The perimeter of a triangle is the total distance around its three sides. To calculate the perimeter of a triangle, you can use the following formula:

P = a + b + c

Where:
- P = Perimeter of the triangle
- a, b, c = Lengths of the three sides of the triangle

Explanation:

1. Identify the Lengths of the Sides: Measure the lengths of all three sides of the triangle.

2. Add the Lengths: Add the lengths of all three sides together to find the perimeter of the triangle.

3. Example:
If the lengths of the sides of a triangle are 5 cm, 7 cm, and 9 cm, the perimeter would be:
P = 5 + 7 + 9
P = 21 cm

4. Units: Don't forget to include the units when stating the perimeter. In the example above, the perimeter is 21 cm.

5. Importance of Perimeter: Calculating the perimeter of a triangle is important in various real-life applications such as construction, architecture, and engineering.

By following the formula and steps mentioned above, you can easily calculate the perimeter of any triangle.