The number of pair of tangents can be drawn to a circle, which are parallel to each other, are …………

The number of tangents that can be drawn to a circle from an external point is ………

If PA and PB are tangents to a circle of radius 5 cm, then their lengths are ……………. cm.

The angle between a tangent and the radius drawn at the point of contact is

From a point Q, the length of the tangent to a circle is 24 cm, and the distance of Q from the centre is 25 cm, then the radius of the circle is

The length of the tangent drawn from a point 17 cm away from the centre of a circle of radius 8 cm is

If the length of a tangent to a circle of radius 6 cm is 8 cm, then the distance of point from which the tangent is drawn to the centre of the circle is

Two concentric circles are of radii 5 cm and 3 cm. Length of the chord of the larger circle which touches the smaller circle is

If tangents PA and PB from a point P to a circle with centre ‘O’ are inclined to each other at angle of 80°, then $\mathrm{\angle }POA\backslash angle\; POA$ =

AP and AQ are two tangents of a circle with centre ‘O’ and $\mathrm{\angle }POQ\backslash angle\; POQ$ = 60°, then $\mathrm{\angle }OPQ\backslash angle\; OPQ$ =