Question

if the vertices of tri angle be (2 1) (5 2)and (3 4) then its circumcentre

Answer 1

circumcentre x = (x1 + x2 + x3)/3
y = (y1 + y2 + y3)/3

in this case.
x = (2 + 5 + 3)/3 = 10/3
y = (1 + 2 + 4) /3 = 7/3