From a point P, the length of the tangent to a circle is 15 cm and distance of P from the centre of the circle is 17 cm. Then what is the radius of the circle?

In figure, a circle inscribed in a Δ ABC,touching AB, BC and AC at P, Q, R respectively, If AB = 10 cm, AR = 7 cm and RC = 5cm then, the length of BC is

In the figure ,AB isa diameter of a circle and PT is a tangent to the circle. If PB = 2 cm, PT = 8 cm, then the radius of the circle is

Two circles touch externally at a point P from a point T on a common tangent PT , tangent segment TA and TB are drawn to the two circles .then TA =

A circle has circumference 88 cm .Then its area is

Two circles of radii 4 cm and 6 cm touch each other .then distance between their centres when they internally is

One angle of a cyclic quadrilateral is 36^o .Then its opposite angle is

In figure, if TP and TQ are the two tangents to a circle with the centre O so that ∠POQ = 110^o, then ∠PTQ =

Which one of the following may be the central angle of a minor arc

In two concentric circles, a chord of the larger circle touches the smaller circle. If the length of this chord is 8 cm and the diameter of the smaller circle is 6 cm then, the diameter of the larger circle is