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Kienkaka2001
2 năm trước
Tam giác ABC có 3 đường trung tuyến AM,BN,CP.Các đoạn thẳng CP, BN, cắt nhau tại G .Biết GA =4cm; GB=GC=6cm a, Tính độ dài các đường trung tuyến của tam giác ABC ? b, chứng minh tam giác ABC ?
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