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Question

In the figure, the bisector of B and C meet at O. Then BOC is


A

90+12A

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B

90+12B

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C

90+12C

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D

9012A

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Solution

The correct option is A

90+12A


From the given figure,
BOC = 180(2 + 4)

= 180 - (B2 + C2 )

= 180 - (180A2)
[ 180 - A = B + C]

= 180 - 90 + A2

= 90 + A2


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