Find the coordinates of the orthocentre of the triangle whose vertices are `(0, 1), (2, -1) and (-1, 3)`

Find the orthocentre of the triangle whose vertices are (0, 0), (6, 1) and (2, 3).

The orthocentre of the triangle whose vertices are (1, 1), (5, 1) and (4, 5) is

Find the coordinates of the orthocentre of a triangle whose vertices are (-1, 3) (2,-1) and (0, 0). [Orthocentre is the point of concurrency of three altitudes].

Find the coordinates of the circumcentre of the triangle whose vertices are (3, 0), (-1, -6) and (4, -1) . Also, find its circumradius.

Orthocentre of the triangle whose vertices are (1, 1) (3, 5) and (3, 0), is

The orthocentre of the triangle whose vertices are (5,-2),(-1,2) and (1,4) is

Find the coordinates of the centroid of the triangle whose vertices are (x_(1),y_(1),z_(1))