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TR-MO-R1 2012 Problem 33

    ∣AB∣=2∣BC∣|AB| = 2|BC| olan ABCDA′B′C′D′ABCDA'B'C'D' dikdörtgenler prizmasında [BB′][BB'] ayrıtı üstündeki EE noktası ∣EB′∣=6∣EB∣|EB'| = 6|EB| koşulunu sağlıyor. AECAEC ve A′EC′A'EC' üçgenlerinde EE ye ait yüksekliklerin ayakları sırasıyla, FF ve F′F' olmak üzere, m(FEF′)=60∘m(FEF') = 60^\circ ise, ∣BC∣/∣BE∣|BC|/|BE| nedir?

    a) 53\sqrt{\dfrac{5}{3}} b) 152\sqrt{\dfrac{15}{2}} c) 3215\dfrac{3}{2}\sqrt{15} d) 5535\sqrt{\dfrac{5}{3}} e) Hiçbiri

    Official text Turkish Mathematical Olympiad, first round 2012 official paper, page 10. Quoted with source.

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