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TR-MO-R1 2013 Problem 13

    Çevrel çemberinin merkezi OO olan bir ABCABC üçgeninin [BC][BC] kenarı üstündeki DD ve EE noktaları DD, BB ile EE arasında yer almak üzere, ∣AD∣=∣DB∣=6|AD| = |DB| = 6 ve ∣AE∣=∣EC∣=8|AE| = |EC| = 8 koşullarını sağlıyor. ADEADE üçgeninin iç teğet çemberinin merkezi II noktası ve ∣AI∣=5|AI| = 5 ise, ∣IO∣|IO| nedir?

    a) 265\dfrac{26}{5} b) 55 c) 235\dfrac{23}{5} d) 215\dfrac{21}{5} e) Hiçbiri

    Official text Turkish Mathematical Olympiad, first round 2013 official paper, page 5. Quoted with source.

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