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vuanhtai
2 năm trước
vẽ tam giác ABC bt AB=3CM;BC=5CM;AC=4CM A) GỌI i LÀ TRUNG ĐIỂM CỦA bc VẼ (I =2.5CM) B) KỂ TÊN CÁC ĐIỂM NẰM TRÊN I C) tính IC; IA.
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