Two lines AB and CD intersect at O. If ∠AOC+∠COB+∠BOD=2700, find the measure of ∠AOC,∠COB,∠BOD and ∠DOA.

Two lines AB and CD intersect at O. If ∠AOC+∠COB+∠BOD=2700, find

1.	Two lines AB and CD intersect at O. If ∠AOC+∠COB+∠BOD=2700, find the measure of ∠AOC,∠COB,∠BOD and ∠DOA.
Answer» Two lines AB and CD intersect at O. If $∠ A O C + ∠ C O B + ∠ B O D = 270^{0}$ , find the measure of $∠ A O C, ∠ C O B, ∠ B O D a n d ∠ D O A$ .