Question
In the figure, YOZ, AOB, COD and EOF are straight lines. Find ∠j + ∠b + ∠c + ∠d + ∠e + ∠g + ∠h + ∠i.
2 m

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In the figure, YOZ, AOB, COD and EOF are straight lines. Find ∠j + ∠b + ∠c + ∠d + ∠e + ∠g + ∠h + ∠i.