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TR-MO-R1 2010 Problem 1

    Bir ABCABC eşkenar üçgeninin iç bölgesindeki bir DD noktası için m(BAD^)=m(ABD^)=5om(\widehat{BAD}) = m(\widehat{ABD}) = 5^o ve dış bölgesindeki bir EE noktası için de, m(CAE^)=m(ACE^)=5om(\widehat{CAE}) = m(\widehat{ACE}) = 5^o ise, m(EDC^)m(\widehat{EDC}) kaçtır?

    a) 45o45^o b) 40o40^o c) 35o35^o d) 30o30^o e) 25o25^o

    Official text Turkish Mathematical Olympiad, first round 2010 official paper, page 2. Quoted with source.

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