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Question

In the given figure, OB and OC are the bisectors of ∠AOD and ∠BOD respectively and ∠BOA = 30°. The measure of ∠DOC is equal to

A

20°
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B

30°
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C

15°
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D

712
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Solution

The correct option is C
15°
Given: ∠BOA = 30°
∴ ∠BOD = 30° (∵ OB bisects ∠AOD)
Also, OC bisects ∠BOD.
BOC=DOC=BOD2
BOC=DOC=302=15
∴ ∠DOC = 15°
Hence, the correct answer is option (c).

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