Regular Polygon

Find the area, perimeter, interior angle, apothem and diagonals of any regular polygon, free online.

Number of sides (n ≥ 3)

Side length

À propos de cette calculatrice

For a regular polygon with n sides of length s: perimeter = n·s, area = n·s²/(4·tan(π/n)), interior angle = (n−2)·180°/n, apothem = s/(2·tan(π/n)) and circumradius = s/(2·sin(π/n)).