A, B, C, D are four points of a circle in the order. A and C are the end points of a diameter, then ∠ADB can be

The length of the complete circle is called its

Which one of the following may be the central angle of a major arc.

Which one of the following may be the central angle of minor arc.

The collection of all the points in a plane which are at a fixed distance from a fixed point in the plane is called 

The number of circle passing through three non - collinear points =

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

Two circles of radii 4 cm and 6 cm touch each others, then distance between their  centres when they touch internally is

The central angle of an arc ABC is 220^o. Then ∠ABC is 

In the given figure A,B,C and D are four points on a circle.AC and BD intersect at a point E such that ∠BEC = 150^o and∠ ECD = 30^o.Then ∠BAC =