Polygon area calculator (n-sided)

Regular n-gon: A = ¼ n s² cot(π/n) · Apothem a = s/(2 tan(π/n))

Area
Perimeter
Apothem
Circumradius
Interior angle

About this tool

Polygon area calculator (n-sided) is a single-purpose utility on instant.tw, a free toolbox of calculators, converters, generators, and quick lookups. Everything works in your browser — nothing is uploaded, nothing is stored on a server unless explicitly noted.

Category: Math & Calculators. Browse more Math & Calculators tools.