Mathematics - Properties of Triangle Question with Solution | TestHub

Consider a triangle ABC and let $\mathrm{a},\mathrm{b}$ and c denote the lengths of the sides opposite to the vertices $A,B$ and $C$ respectively .Suppose $a=6,b=10$ and the area of the triangle is $15\sqrt{3}$. If $\angle ACB$ is obtuse and if ' r ' denote the radius of the incirlce of the triangle then $r^2=$