Regular Polygon Interior Angle
A regular polygon shares its total interior angle sum evenly across its vertices.
Regular Polygon Interior Angle
Polygons · 1 input
How to use this calculator
- Enter number of sides in count.
- Select Calculate and keep the output unit with the answer.
Before you use the answer
Start with a dimensioned sketch and label the units beside every measurement. Distinguish the outer edge from an internal opening, and distinguish a radius from a diameter. A geometric model is most useful when the shape actually matches the assumptions in the formula.
For an irregular polygon this value is only the average interior angle, not necessarily any actual angle.
Does it save my inputs?
No calculation history is stored by this website. The calculator works locally in your browser. See the privacy policy for hosting and contact details.
Why might a result be approximate?
Measurement uncertainty, ideal-model assumptions and floating-point rounding can all matter. Displaying more digits does not improve the original measurement.
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