In the following figure,PQ is the diameter of the circle with radius 5 cm. if AT is the tangent and equal to the radius of the circle, then find the lenth of AR.

In the following figure,PO is the diameter ofthe circle with radius 5cm. If AT is the tangentand equal to the radius of the circle, then find thelength of AR.

. The diameter of a circle is 15cm. Find its radius.

The circumference of the circle is 2 cm more than to the perimeter of the rectangle. The length of the rectangle is equal to the diameter of the circle and the breadth of the rectangle is equal to the radius of the circle. Then find the radius of the circle.

The diameter of a circle is 14 cm, find its radius.

In the following figure, if PQ = R (P is the centre of the bigger circle) and the shaded area is equal to A, then the radius of the inner circle is equal to -

In the following figure, if PQ = R (P is the centre of the bigger circle) and the shaded area is equal to A, then the radius of the inner circle is equal to -