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TR-MO-R1 2017 Problem 23

    ∣AB∣=∣AC∣|AB|=|AC| ve tan⁡B=512\tan B=\dfrac{5}{12} olan ABCABC üçgeni veriliyor. Yarıçapı 1 olan bir çember ABAB ve ACAC kenarlarına sırasıyla KK ve LL noktalarında teğet olup BCBC kenarını PP ve QQ noktalarında kesmektedir. PP, BB ile QQ arasında ve ∣BK∣=125|BK|=\dfrac{12}{5} ise BQKBQK üçgeninin alanı kaçtır?

    A) 32\dfrac{3}{2} B) 85\dfrac{8}{5} C) 10865\dfrac{108}{65} D) 2513\dfrac{25}{13} E) 14465\dfrac{144}{65}

    Official text Turkish Mathematical Olympiad, first round 2017 official paper, page 13. Quoted with source.

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