Question
In the figure, STXZ, VUXY and RTUW are three straight lines.  ∠s = 67° and ∠x = 57°. Find the value of ∠r + ∠t + ∠v + ∠w.
2 m

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In the figure, STXZ, VUXY and RTUW are three straight lines.  ∠s = 67° and ∠x = 57°. Find the value of ∠r + ∠t + ∠v + ∠w.