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Circle-mania: IMO 2011 G4
Автор: gozenome
Загружено: 2026-01-14
Просмотров: 5
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The biggest takeaway: In many problems, ideally, you want to transform the problem into proving an angle-chasing condition and then find many, many circles. Circles are a very, very powerful tool, especially when dealing with angles, and especially when the circles can encode the information from the problem's conditions.
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