Regular Polygon Perimeter Calculator
Calculate regular polygon perimeter from side length, circumradius, apothem, or area and a whole number of equal sides.
Regular polygon perimeter from one repeated side
English competitors focus on a simple pattern: a regular polygon has equal sides, so perimeter is side count times side length. Extra modes recover the side from radius, apothem, or area.
| Known value | What the calculator finds first | Output |
|---|---|---|
| Side length | Side is already known | Perimeter |
| Circumradius | Side from center-to-vertex radius | Perimeter |
| Apothem | Side from center-to-side distance | Perimeter |
| Area | Side from area and side count | Perimeter |
Regular polygon formulas
P is perimeter; n is side count; a is side length.
R is circumradius.
A is area; r is apothem.
Frequently Asked Questions
Sources and References
- Regular PolygonWolfram MathWorld
- Regular Polygon CalculatorOmni Calculator
- Polygon CalculatorCalculator.net
Calculations are based on the listed reference sources. Links open in a new tab.
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