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fearthefury1203
2 năm trước
Cho tam giác ABC ,M là trung điểm cạnh BC.Trên tia đối tia MA lấy điểm D SAO CHO md=ma .Gọi N là trung điểm cạnh AB .Trên tia đối tia NC lấy điểm E sao cho NE =NS .Chứng minh : a, Tam giác MAC = tam giác MBC b, AC = BC ,AB // BD c, B là trung điểm đoạn thẳng DE d, AEB =CED Vẽ hình hộ mk vs
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