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

Two circles with radii 3 cm and 2.5 cm touch each other externally then find the distance between their centre.

Two circles with radii a and b respectively touch each other externally . Let c be the radius of a circle that touches these two circles as well as a common tangent to the circles. Then

Two circles with radii 5 cm and 4.5 cm touch each other externally then find the distance between their centre.

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

If the four equal circles of radius 3 cm touch each other externally, then the area of the region bounded by the four circles is

The radical center of three given circles will be the center of a fourth circle which cuts all the three circles orthogonally.

Two circle with radii r_(1) and r_(2) respectively touch each other externally. Let r_(3) be the radius of a circle that touches these two circle as well as a common tangents to two circles then which of the following relation is true

If two circles of radius 4cm and 1cm touch each other externally then length of the direct common tangents is