A,B and C are three points on a circle with centre O such that ∠BOC is equal to 30∘ and ∠AOB is equal to 60∘. If D is another point on the circle other than the arc ABC find ∠ADC.

A,B and C are three points on a circle with centre O such that ∠BOC

1.	A,B and C are three points on a circle with centre O such that ∠BOC is equal to 30∘ and ∠AOB is equal to 60∘. If D is another point on the circle other than the arc ABC find ∠ADC.
Answer» $A, B$ and $C$ are three points on a circle with centre $O$ such that $∠ B O C$ is equal to $30^{\circ}$ and $∠ A O B$ is equal to $60^{\circ}$ . If $D$ is another point on the circle other than the arc $A B C$ find $∠ A D C$ .