Question
In the figure, EFKM, HGKL and DFGJ are three straight lines.  ∠t = 71° and ∠y = 50°. Find the value of ∠s + ∠v + ∠w + ∠x.
2 m

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In the figure, EFKM, HGKL and DFGJ are three straight lines.  ∠t = 71° and ∠y = 50°. Find the value of ∠s + ∠v + ∠w + ∠x.