Polygon Circumcircle Formula

Equation for calculate polygon circumcircle is,

Circumradius (r) = l / (2 x sin( π / n ))
Area of the polygon = ( n x l² ) / ( 4 x tan( π / n ) )
Regular Polygon Circumcircle Area = 3.14 x r²

Where,
n = Number of sides of the polygon,
r = circumradius,
l = Length of the side of the polygon