7 класс Атанасян. Вся геометрия за 100 минут. Треугольник, окружность, задачи на построение

Whole-channel inclusion: Математик МГУ is an honest teaching channel (title sample + 3 transcripts read: The transcripts show genuine structured math teaching (deriving trig definitions, solving exam problems step by step), consistent with the channel's 'whole' verdict.); this title passed a strict title check (sonnet) after a labelling pass.