⬡ Polygon Calculator
Calculate properties of regular polygons
About Regular Polygons
A regular polygon has all sides equal and all angles equal.
Properties
- Perimeter: P = n × s (n = sides, s = side length)
- Interior Angle: (n-2) × 180° / n
- Exterior Angle: 360° / n
- Area: (Perimeter × Apothem) / 2
Frequently Asked Questions
What is an apothem?
The apothem is the distance from the center to the midpoint of any side.
Sum of interior angles?
For any polygon: (n-2) × 180° where n is the number of sides.