All formulas for radius of a circumscribed circle.
Radius of the circumcircle of a triangle
, 
, 
- sides of a triangle
- semiperimeter
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- circumcenter
Calculate the radius of the circumcircle of a triangle if given all three sides ( R ) :
Radius of the circumscribed circle of an equilateral triangle
- side of a triangle
- height
- circumcenter
Calculate the radius of the circumcircle of an equilateral triangle if given side or height ( R ) :
Radius of the circumscribed circle of an isosceles triangle
- equal sides of a triangle
- side (base)
- circumcenter
Calculate the radius of the circumcircle of an isosceles triangle if given sides ( R ) :
Radius of the circumscribed circle of a right triangle
, - legs of a right triangle
- hypotenuse
- circumcenter
Calculate the radius of the circumcircle of a right triangle if given legs or hypotenuse ( R ) :
Radius of the circumscribed circle of a rectangle
, - sides of a rectangle
- diagonal
- circumcenter
Calculate the radius of the circumcircle of a rectangle if given sides or diagonal ( R ) :
Radius of the circumcircle of a regular hexagon
- equal sides of a hexagon
- diagonal
- circumcenter
Calculate the radius of the circumcircle of a regular hexagon if given side or diagonal ( R ) :
Radius of the circumscribed circle of a square
- side of a square
- diagonal
- circumcenter
Calculate the radius of the circumcircle of a square if given side or diagonal ( R ) :
Radius of the circumscribed circle of an isosceles trapezoid
- equal sides of a trapezoid
, 
- bases
- diagonal
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- circumcenter
Calculate the radius of the circumcircle of an isosceles trapezoid if given sides and diagonal ( R ) :
Radius of the circumscribed circle of a regular polygon
- 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 ) :
