Circumcenter of a Triangle

If A (2,7) ,B (-6,1) and C (-5,8) are the vertices of a triangle, then find the co-ordinates of circumcenter of that triangle .

Find the co-ordinates of the circumcenter of the triangle whose vertices are A(-2,3),B(6,-1),C(4,3)

Answer the following questions:Find the coordinates of the circumcenter of the triangle whose vertices are (-2,2),(2,-1)and (4,0).

Find the circumcenter of the triangle whose vertices are (-2,3) , (2 , -1) , (4 , 0) .

Find the co- ordinates of the circumcenter of the triangle whose vertices are (3, 7) , (0, 6) and (-1, 5) . Find the circumradius.

Find the distance between the orthocenter and circumcenter of the triangle with vertices (0,0)*(a,0) and (0,b)

The circumcenter of the triangle formed by the point (1,2,3) (3,-1,5), (4,0,-3) is

The circumcenter of the triangle formed by the line y=x ,y=2x , and y=3x+4 is