Circles - ix

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

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

The region between a chord and either of the arcs is called

The region between an arc and the two radii, joining the centre to the end points of the arc is called a

In how many parts a plane can divides a circle if it intersect perpendicular ?