Consider the figure and find radius of bigger circle. `C_1` is centre of bigger circle and radius of smaller circle is unity.

O is the centre of the smaller circle,O' is the centre of bigger circle.CD is tangent to the smaller circle,Find the radius of the smaller circle.

In the figure below, the radius of the bigger circle is (sqrt(2) +1) cm and the radius of all the smaller circles are equal. Each of the smaller circles touches two of the other three smaller circles and the larger circle as shown. Find the area (in cm2) of the shaded portion.

In a given figure, find radius of smaller circle, if PQRS is the square?

Find the ratio of the area of the bigger circle and smaller circle. I. The radius of the smaller circle is 24 cm. II. The difference between the radii of bigger and the smaller circles is 3 cm.

In a given figure, TQ and TP are tangents on bigger circle with centre O and TP & TR are tangents on smaller circle with O' then find the ratio of TQ : TR?

In the given figure, centre of two circles is O. Chord AB of bigger circle intersects the smaller circle in points P and Q . Show that AP = BQ.

In the given figure, centre of two circles is O. Chord AB of bigger circle intersects the smaller circle in points P and Q . Show that AP = BQ.

The adjoining figure shows two circles with the same centre.The radius of the larger circle is 10cm and the radius of the smaller circle is 4cm.