Interior polygon angle Calculator

How to calculate interior polygon angle

This tool calculates interior polygon angle from Sides (integer ≥ 3). Enter each quantity in its labelled field, then use the formula below to check the calculation.

Formula

(n − 2) × 180 ÷ n, regular polygon

Worked example

Sides (integer ≥ 3)

6

Applying the formula to these values gives 120 degrees.

What should I check?

Find the area, perimeter, surface area or volume of common shapes. Use consistent length units: metres produce square metres for areas and cubic metres for volumes.

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