ABC is a triangle whose circumcentre, incentre and orthocentre are O, I and H respectively which lie inside the triangle, then :

In a triangle, if orthocentre, circumcentre, incentre and centroid coincide, then the triangle must be

In a Delta ABC the equation of the side BC is 2x-y =3 and its circumcentre and orthocentre are (2,4) and (1,2) respectively . Circumradius of Delta ABC is

In a Delta ABC the equation of the side BC is 2x-y =3 and its circumcentre and orthocentre are (2,4) and (1,2) respectively . Circumradius of Delta ABC is

If the centroid and orthocentre of a triangle are (3,3) and (-3,5) respectively then the circumcentre is

In a triangle, if orthocentre, circumcentre, incentre and centroid coincide, then the triangle must be_____