Question 20 In figure, ∠OAB=30∘ and ∠OCB=57∘. Find ∠BOC and ∠AOC.

Question 20 In figure, ∠OAB=30∘ and ∠OCB=57∘. Find ∠BOC and

1.	Question 20 In figure, ∠OAB=30∘ and ∠OCB=57∘. Find ∠BOC and ∠AOC.
Answer» Question 20 In figure, $∠ O A B = 30^{\circ} a n d ∠ O C B = 57^{\circ} . F i n d ∠ B O C a n d ∠ A O C$ .