In the adjacent figure, there are two concentric circles with centre ‘O’. Chord AD of the bigger circle intersects the smaller circle at B and C. Show that AB = CD.

In the adjacent figure, which lines are tangents to the circle ?

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

Draw two concentric circles with centre O and radii 3 cm and 5 cm. From a point on the biggercircle, draw tangents to the smaller circle.

In the adjacent figure, AB is a chord of circle with centre O. CD is the diameter perpendicualr to AB. Show that AD = BD

The radii of two concentric circles are 40 cm and 41 cm What is the length of a chord of the bigger circle which is tangent to the smaller circle?

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

Two cocentric circles are of radii 7cm and 25cm. Find the length of the chord of the larger circle which touches the smaller circle.

In the given figure, two concentric circles with centre O and radii 5cm and 3 cm are given, PA and PB are tangents to those circle at A and B respectively. If PA =12cm, find PB.

In the given figure, AB and CD are two diameters of a circle (with centre O) perpendicular to each other and OD is the diameter of the smaller circle. If OA = 7 cm, find the area of the shaded region.

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