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TR-MO-R1 2022 Problem 29

    Bir ABCABC ikizkenar üçgeninde ∣AB∣=∣AC∣=32|AB| = |AC| = 3\sqrt{2} ve ∣BC∣=22|BC| = 2\sqrt{2} dir. [BC][BC] kenarının orta noktası DD ve BB noktasından [AC][AC] kenarına inilen dikmenin ayağı EE noktasıdır. Buna göre DD den geçen ve ACAC doğrusuna EE noktasında teğet olan çemberin yarıçapı kaçtır?

    a) 54\dfrac{5}{4} b) 11 c) 34\dfrac{3}{4} d) 12\dfrac{1}{2} e) 14\dfrac{1}{4}

    Official text Turkish Mathematical Olympiad, first round 2022 official paper, page 17. Quoted with source.

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