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dtnminh306
2 năm trước
Cho tam giác ABC vuông cân tại A . Gọi M là trung điểm của AC . Trên tia đối của tia MB lấy điểm D cho MD=MB a. Cminh ΔBMC = ΔDMA suy ra AD song song BC b. Cminh ΔADC là Tam giác cân c. Trên tia đối của tia CA lấy điểm E sao cho CA=CE Cminh DC đi qua trung điểm 1 của BE Cần gấp ạaaa =)))
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