Одно применение теоремы Птолемея

Образец цитирования: Nikonorov Yu. G. and Oskorbin D. N. One Application of Ptolemy's Theorem // Владикавк. мат. журн. 2025. Т. 27, № 4. C. 103-108 (in English). DOI 10.46698/o1944-0990-7792-e

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