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В прямоугольнике ABCD диагонали пересекаются в тоске О.Найдите периметр треугольника AOB,если угол CAD=30 градусов,AC=12см.СРОЧНО.ПЛИЗ С ОБЬЯСНЕНИЯМИ //////////////////////
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Спасибо)
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nicodemotarl - 5 лет назад
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