Circles - ix

Diagonals of a cyclic quadrilateral are the diameters of thai circle, then quadrilateral is a

Given three collinear points, then the number of circles which can be drawn through three points are

Given a chord AB of length 5 cm, of a circle with centre 0 . OL is perpendicular to chord AB and OL = 4 cm. OM is perpendicular to chord CD such that OM = 4 cm. Then CM is equal to

Given two concentric circles with centre O. A line cuts the circles at A, B, C, D respectively ifAB = 10 cm then length CD is

Given a circle with centre O and chords AB, PQ and XY. Points P, Q and O are collinear and radius of a circle is 6 cm. Then mark the correct option

Given a circle with centre O and smallest chord AB is of length 3 cm, largest chord CD is of length 10 cm and chord PQ is of length 7 cm, then radius of the circle is