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TR-MO-R1 2017 Problem 27

    s(A^)=60∘s(\hat{A})=60^\circ olan ABCABC üçgeninin çevrel çemberi çiziliyor. BB köşesinden çizilen teğet doğru ile CACA kenarının uzantısı DD noktasında kesişiyor. Burada AA noktası, CC ile DD arasındadır. ∣DC∣=4|DC|=4, ∣AB∣+∣AD∣=∣AC∣|AB|+|AD|=|AC| ise ∣BC∣∣AB∣=?\dfrac{|BC|}{|AB|}=?

    A) 22 B) 32\dfrac{\sqrt{3}}{2} C) 32\dfrac{3}{2} D) 2\sqrt{2} E) 3\sqrt{3}

    Official text Turkish Mathematical Olympiad, first round 2017 official paper, page 15. Quoted with source.

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