[" Three circles of radii "a,b,c(a

A line is tangent to three circles with radii a b,c (a>b>c) as shown.Then,which of the following is true?

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

3 circles of radii a, b, c (a lt b lt c) touch each other externally and have x-axis as a common tangent then

3 circles of radii a, b, c (a lt b lt c) touch each other externally and have x-axis as a common tangent then

Three circles whose radii are a,b and c and c touch one other externally and the tangents at their points of contact meet in a point. Prove that the distance of this point from either of their points of contact is ((abc)/(a+b+c))^(1/2) .

Three circles whose radii are a,b and c and c touch one other externally and the tangents at their points of contact meet in a point. Prove that the distance of this point from either of their points of contact is ((abc)/(a+b+c))^(1/2) .

A = (0,0 ) , B=( 4,0 ) ,C= ( 0,6) are the three centres of three circles of equal radii which do not touch externally pairwise. Then the radical centre of the circles is

In the figure , two concentric circles of radii a&b(a>b) are given.The chord AB of larger circle touches the smaller circle at C .The length AB is :