If in a `DeltaABC, AD, BE and CF` are the altitudes and R is the circumradius, then the radius of the circumcircle of `DeltaDEF` is

If in a triangle ABC, AD, BE and CF are the altitudes and R is the circumradius, then the radius of the circumcircle of Delta DEF is

If in a Delta ABC, AD, BE and CF are the altitudes and R is the circumradius, then find the radius of the DEF.

In a triangle ABC, AD, BE and CF are the altitudes and R is the circum radius, then the radius of the circle DEF is

If in a triangle ABC,AD,BE and CF are altitudes and R is the circum-radius, then then radius of the circle DEF is

If in a triangle ABC, AD, BE and CF are the attitude and R is the circum-radius then find the radius of circle circumscribing the triangle DEF.

In a DeltaABC, " if "a:b:c=4:5:6 , then the ratio of the radius of the circumcircle to the radius of the incircle is

In DeltaABC, if AD is the altitude and O is the orthocentre of DeltaABC then AO:OD=