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Question

In the given figure OA,OB are opposite rays and AOC + BOD = 900, then COD is
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A
900
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B
600
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C
450
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D
300
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Solution

The correct option is A 900
We know that sum of angles along a straight line is 1800.
Now, we can write:
AOC+BOD+COD=1800
COD=1800(AOC+BOD)
AOC+BOD=900
COD=1800900
COD=900



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