Input Values

Must be 3 or more

Result

Enter number of sides and side length, then click Calculate.

About Regular Polygons

A regular polygon has all sides equal and all angles equal. Common examples:

  • Triangle: 3 sides
  • Square: 4 sides
  • Pentagon: 5 sides
  • Hexagon: 6 sides
  • Octagon: 8 sides

Apothem: The distance from the center to the middle of any side.

Plane Geometry Calculators