How it works

Find the total distance around any polygon by simply adding up all its side lengths. This tool is perfect for homework or quick checks to ensure your geometry calculations are correct.

The Formula

Perimeter = Side₁ + Side₂ + Side₃ +. + Sideₙ

Worked Example

1. Example: Triangle Perimeter

   Imagine a triangle with side lengths of 3 cm, 4 cm, and 5 cm. To find its perimeter, you just add these values: 3 + 4 + 5 = 12 cm. The calculator will show 'Perimeter: 12'.

Tips, Assumptions & Limitations

• Ensure all side lengths are in the same unit before entering them.
• A polygon must have at least three sides. Enter each side length separated by a comma.
• Double-check your input for any missing or incorrect values.