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thamntcvp
2 năm trước
Cho tam giác ABC. Gọi K, D lần lượt là trung điểm của các cạnh AB, BC. Trên tia đối của tia DA lấy điểm M sao cho DM = DA. Trên tia đối của tia KM lấy điểm N sao cho KN = KM. Chứng minh a, tam giác ADC = tam giác MDB b, tam giác AKN = tam giác BKM c) A là trung điểm của đoạn thẳng NC Nhanh giùm mk nhé
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