If a number of circles passes through the end points of line segment PQ. Then the centres of all circles lie on the perpendicular bisector of PQ.

Out of two concentric circles, the radius of outer circle is 5 cm and the chord AC of length 8 cm of outer circle touches the inner circle, then the radius of inner circle is

Two tangents PQ and PR are drawn from an external point P to a circle with centre 0. then quadrilateral PQOR is _______

AB is diameter of a circle and AC is its chord such that  = 30^o. If tangent at C intersects extended AB at D .then,

 If tangents PA and PB from a point P to a circle with centre O are inclined to each other at an angle of 80° then \(\angle \)POA is equal to

ABC is a right angled triangle, right angled at B such that BC = 6 cm and AB = 8 cm. A circle with centre O is inscribed in △△ABC. The radius of the circle is

If four sides of a quadrilateral ABCD are tangential to a circle, then

IF diagonals of a cyclic quadrilateral are equal then the quadriilateral is:

The length of tangent from an external point P to a circle with centre O is always less than OP.

If a chord AB subtends an angle 60^o at the center , then angle between tangents at A and B is also 60^o.