Radius of a Circumcscribed Circle Calculator

An online calculator to calculate the radius R of a circumscribed circle of a triangle of sides a, b and c.
This calculator accepts the three sides of the triangle and uses the second of the formulas for the radius R of the circumscribed circle given below. 1) If you know one side of the triangle and the corresponding opposite angle, you may use the formula \[ 2 R = \dfrac{a}{\sin(A)} = \dfrac{b}{\sin(B)} = \dfrac{c}{\sin(C)} \] 2) If you know all three sides, you may use the formula \[ R = \dfrac{a \cdot b \cdot c}{4\sqrt{s(sa)(sb)(sc)}} \] where \( s = \dfrac{a+b+c}{2} \)
Use of Radius of Circumscribed Circle CalculatorEnter the sides a, b and c of the triangle as positive real numbers and press "enter". The output is the radius of the circumscribed circle. If one of the sides of the triangle is negative or the sum of any two positive sides is smaller that the third one (i.e the triangle does not exist), there will be no solution.Example More References and LinksRadius of Circumcircle.Online Geometry Calculators and Solvers. 