Question Number 75329 by lalitchand last updated on 10/Dec/19
Answered by $@ty@m123 last updated on 10/Dec/19
$${R}=\frac{{abc}}{\mathrm{4}\bigtriangleup} \\ $$$${where}, \\ $$$$\bigtriangleup=\sqrt{{s}\left({s}−{a}\right)\left({s}−{b}\right)\left({s}−{c}\right)} \\ $$