Radius of the circumscribed circle of an equilateral triangle

radius circumscribed circle equilateral triangle

a12 blue    -  side of a triangle

h  - height    

O black  - circumcenter    

 

 

Calculate the radius of the circumcircle of an equilateral triangle if given side or height ( R  ) :

radius circumscribed circle equilateral triangle F1     radius circumscribed circle equilateral triangle F2