In the diagram the smaller circle is drawn such that it passes through the Centre of the larger and touches the larger circle. What is the radius of the smaller circle if the diameter of the larger circle is D?
In the adjoining figure the diameter of the larger circle is 10 cm and the smaller circle touches internally the larger circle at P and passes through O, the center of the larger circle. Chord SP cuts the smaller circle at R and OR is equal to 4 cm. What is the length of the chord SP?