Question
In the figure, PQR is an equilateral triangle, KLMN is a square and QLMR is a straight line. Find the sum of ∠s, ∠t, ∠u and ∠v.
4 m

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In the figure, PQR is an equilateral triangle, KLMN is a square and QLMR is a straight line. Find the sum of ∠s, ∠t, ∠u and ∠v.