Three circles of radii `1, 2, 3` touch other externally. If a circle of radius` r` touches the three circles, then `r` is

Circles of radii 2,2,1 touch each other externally.If a circle of radius r touches all the three circles externally,then r is

Two circles of radius 1 and 4 touch each other externally.Another circle of radius r touches both circles externally and also one direct common tangent of the two circles.Then [(1)/(r)]=

Two circles of radii 9cm and 4cm touch each other externally. Another circle of radius C touchs these two circles and their direct common tangent. Find C.

The circles having radii 1, 2, 3 touch cach other externally then the radius of the circle which cuts three circles orthogonally is

The circles having radii 1, 2, 3 touch cach other externally then the radius of the circle which cuts three circles orthogonally is

The equation of a circle of radius r and touching both the axes is

The circles having radii 1,2,3 touch each other externally then find the radius of the circle which cuts the three circles orthogonally.

The circles having radii 1,2,3, touch each other externally then find the radius of the circle which cuts the three circles orthogonally

Three circles of radius a, b, c touch each other externally. The area of the triangle formed by joining their centre is