Question
In the figure, DEGH, FENM, FGJK, HJLM and DNLK are straight lines. Find the value of ∠y + ∠z + ∠a + ∠b.
3 m

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In the figure, DEGH, FENM, FGJK, HJLM and DNLK are straight lines. Find the value of ∠y + ∠z + ∠a + ∠b.