From a point P,the length of the tangent to a circle is 24cm and distance of P from the centre is 25cm.Find radius.

Prove that chords of the same length in a circle are at the same distance from the centre.

In the figure 0 is the center of the circle. AB and PQ are two chords at equal distance from the center. A B=12 cm, OC=8 cm is the perpendicular distance from center to AB a) What is the length of PQ? b) Calculate the radius of the circle.

The length' of an arc of a circle is 4 cm . What is the length of an arc of the same central angle in a circle of double the radius?

In a circle a chord of length 42 cm is 20 cm away from the centre. Find the radius of the circle.

In the figure 0 is the centre of the circle. OB=5 cm. Distance from 0 to chord AB is 3 cm. Find the length of A B.

Find the length of an arc of a circle of radius 5 cms subtending a central angle measuring 15^@

Find the coordinates of a point on y -axis which are at a distance of 5 sqrt2 from the point P(3,-2,5)