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

Three circles of radii 1,2,3 touch other externally.If a circle of radiusr touches the three circles,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 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

Circles of radii 36 and 9 touches externally. The radius of the circle which touches the two circles externally and also their common tangent is

Two circle of radii R and r ,R > r touch each other externally then the radius of circle which touches both of them externally and also their direct common tangent, is R (b) (R r)/(R+r) (R r)/((sqrt(R)+sqrt(r))^2) (d) (R r)/((sqrt(R)-sqrt(r))^2)

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