,  ,     -  sides of a triangle

- semiperimeter

- circumcenter

Calculate the radius of the circumcircle of a triangle if given all three sides ( R  ) :

-  side of a triangle

- height

- circumcenter

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

- equal sides of a triangle

- side  (base)

- circumcenter

Calculate the radius of the circumcircle of an isosceles triangle if given sides ( R  ) :

,    -  legs of a right triangle

- hypotenuse

- circumcenter

Calculate the radius of the circumcircle of a right triangle if given legs or hypotenuse ( R  ) :

-  side of a square

- diagonal

- circumcenter

Calculate the radius of the circumcircle of a square if given side or diagonal ( R  ) :

,    -  sides of a rectangle

- diagonal

- circumcenter

Calculate the radius of the circumcircle of a rectangle if given sides or diagonal ( R  ) :

- equal sides of a trapezoid

,    - bases

- diagonal

- circumcenter

Calculate the radius of the circumcircle of an isosceles trapezoid if given sides and diagonal ( R  ) :

- equal sides of a hexagon

- diagonal

- circumcenter

Calculate the radius of the circumcircle of a regular hexagon if given side or diagonal ( R  ) :

-  side  of a polygon

-  number  of sides

- circumcenter

Calculate the radius of the circumcircle of a regular polygon if given side and number of sides ( R  ) :