Prove that in two concentric circles, the chord of the larger circle which touches the smaller circle is bisected at the point of contact.

In two concentric circle,prove that a chord of larger circle which is tangent to smaller circle is bisected at the point of contact.

In two concentric circles prove that all chords of the outer circle which touch the inner circle are of equal length.

In two Concentric circles, AB and CD are two chords of the outer circle which touch the inner circle at E and F. Then :

In two concentric circles, a chord of length 8cm of the larger circle touches the smaller circle. If the radius of the larger circle is 5cm then find the radius of the smaller circle.

Find the area of the region between the two concentric circles, if the length of a chord of the outer circle just touching the inner circle at a particular point on it is 10 cm (Take, pi = (22)/(7) )

In the figure, M is the point of contact of two internally touching circles. The chord CD of the bigger circle touches the smaller circle at point N. Line AMB is their common tangent. Prove MN bisects /_CMD

Two concentric circles are of radii 6.5cm and 2.5cm . Find the length of the chord of the larger circle which touches the smaller circle.

Two concentric circles are of radii 5 cm. and 3 c. Find the length of the chord of the larger circle which touches the cmaller circle.

In the adjoining figure, O is the centre of two concentric circles. The chord AB of larger circle intersects the smaller circle at C and D. (i) Find AC:BD . (ii) If AC=2cm , then find the length of BD.