Find the value of ∠OBE=?

The difference between the interior and the exterior angles of a regular polygon is 150^o. Find the number of sides in the polygon.

The length of a chord which is at a distance of 12 cm from the center of a circle of radius 13 cm is 

The exterior angle of a regular polygon is one-third of its interior angle, the number of sides of the polygon is -

The radius of a circle is 14 cm. what is area of another circle having radius 1.5 times the actual circle?

In ∆ABC, AC = BC and ∠BAC = 40°. If BC is extended to D such that BC = CD, find out ∠ADC = ?

O is the incentre of ∆ABC and ∠A = 30° then ∠BOC is

Two circles intersect at A and B, P is a point on produced BA. PT and PQ are tangents to the circles. The relation of PT and PQ is