Circumcentre=(2,3) =>eqn of circumcircle :(x-2)2+(y-3)2=r2
and eqn BC : y=x => pt B and C lie on this line
=> soln of circumcircle of triangle ABC and Line BC will have two distinct real solutions
also orthocentre is intersection of altitudes of triangle...
and centroid divides O and C in ratio 2:1
can we find radius using this info ??[7][7]