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Question

In the adjoining figure, AOB is a straight line. Find the value of x. Also, find ∠AOC, ∠COD and ∠BOD.

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Solution

AOB is a straight line. Therefore,
AOC+COD+BOD=180°3x+7°+2x-19°+x°=180°6x=192°x=32°
Therefore,
AOC=3×32°+7=103°COD=2×32°-19=45° andBOD=32°

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