If $R=\frac{65}{8}, r_1=\frac{21}{2}$ and $r_2=12$ are the circum radius, radii of the excircles opposite to…
If $R=\frac{65}{8}, r_1=\frac{21}{2}$ and $r_2=12$ are the circum radius, radii of the excircles opposite to the vertices $A$ and $B$ of a triangle $A B C$ respectively, then the area of the triangle (in square units) is