Question
In the figure, QRVX, TSVW and PRSU are three straight lines.  ∠b = 75° and ∠f = 55°. Find the value of ∠a + ∠c + ∠d + ∠e.
2 m

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In the figure, QRVX, TSVW and PRSU are three straight lines.  ∠b = 75° and ∠f = 55°. Find the value of ∠a + ∠c + ∠d + ∠e.