3 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?

Two concentric circles of radii a and b (agtb) are given . The chord AB of larger circle touches the smaller circle at C, the length of AB 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 :

Two concentric circles of radii a and b(a gt b) are given. Find the length of the chord of the larger circle which touches the smaller circle.

Two circles of radii a and b(a

Find the areas of the circles whose radii are (a) 14m (b) 28cm

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

The distance between the centres of two circles of radii 3.4 cm and 1.8 cm is 3.7 cm. Then the circles are :