The distance between the orthocentre and circumcentre of the triangle with vertices `(0,0), (4,0), (0,6)` is

The distance between the orthocentre and the circumcentre of the triangle with vertices (0, 0), (0, a) and (b, 0) is

The circumcentre of the triangle with vertices (0,30),(4,0)and(30,0) is

The circumcentre of the triangle with vertices (0, 0), (3, 0) and (0, 4) is

The circumcentre of the triangle with vertices (0, 30), (4,0) and (30,0) is

The circumcentre of the triangle, whose vertices are (0,0),(4a,0),(0,6a) is

The distance between orthocentre and circumcentre of an equilateral triangle is

The distance between orthocentre and circumcentre of an equilateral triangle is

circumcentre of the triangle whose vertices are (1,0),(3,0) and (1,6) is

The circumcentre of a triangle with vertices (-2, 3), (2, -1), (4, 0) is