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Question

In fig., if <OAB=40, the < ACB is equal to:


A
50
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B
40
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C
60
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D
70
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Solution

The correct option is A 50
Since OA = OB
Therefore OAB=OBA=40
Now, AOB=180(40+40)=100
(By angle sum property of a triangle)
ACB=50

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