22. to In the given figure the lines AB and CD intersect at the point O. Find the measure of: D (a) AOC (b)

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22. to In the given figure the lines AB and CD intersect at the point O. Find the measure of: D 0 (a) AOC (b) COB (c)BOD( d) DOA

Answer:Correct option is A)

Let ∠AOC=x and ∠COB=y. Then, ∠BOD=x and ∠DOA=y.

Now, ∠AOC+∠COB+∠BOD=270

⇒x+y+x=270

⇒2x+y=270

But, x+y=180

∴x=y=90

Step-by-step explanation:

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