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TR-MO-R1 2023 Problem 21

    Bir ABCABC üçgeninin [BC][BC] kenarı üzerinde köşelerden farklı bir DD noktası alınıyor. ∣AB∣=∣AD∣|AB| = |AD|, ∣CD∣∣BD∣=3+23\dfrac{|CD|}{|BD|} = 3 + 2\sqrt{3}, m(ACB^)=15∘m(\widehat{ACB}) = 15^\circ ise, m(ABC^)m(\widehat{ABC}) kaçtır?

    a) 75∘75^\circ b) 60∘60^\circ c) 45∘45^\circ d) 30∘30^\circ e) Hiçbiri

    Dataset text TÜBİTAK olympiad set, Matematik_2023_1.Asama_21. Quoted with source.

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