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TR-MO-R1 2016 Problem 9

    Bir ABCABC üçgeninde iç teğet çember BC,CA,ABBC, CA, AB kenarlarına sırasıyla D,E,FD, E, F noktalarında teğettir. EFEF doğrusu [CB[CB ışınını PP noktasında kesiyor. Buna göre ∣BD∣=1|BD| = 1, ∣CD∣=3|CD| = 3, ∣PF∣=5|PF| = \sqrt{5} ise ∣CA∣|CA| uzunluğu kaçtır?

    a) 44 b) 252\sqrt{5} c) 55 d) 424\sqrt{2} e) 66

    Official text Turkish Mathematical Olympiad, first round 2016 official paper, page 5. Quoted with source.

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