October 2021 0 46 Report
Даю 100 баллов Знатоки ,помогайте 1)Доказать,что площадь треугольника АВС,вписанного в окружность равна S=(abc)/4R
2)Дан четырехугольник АВСД, точка О-точка пересечения диагоналей
Доказать,что SAOBxSCOD=SAODxSBOC
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