Regular Polygons

The follwoing elements of a regular polygon are calculated if one of them is given:

• Side   a
• Incircle radius   r_i
• Circumcircle radius   r_c
• Perimeter   u
• Area   A

Example:

Given : 
        Vertices  n = 6
    Circumcircle rc = 1
 
Results : 
            Side  a = 1
        Incircle ri = 0,8660254
       Perimeter  p = 6
            Area  A = 2,5980762