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hanhibang
2 năm trước
Cho tam giác ABC cân tại A đường cao AD.Gọi E là điểm đối xứng với D qua trung điểm M của AC a)Tứ giác ADCE là hình gì?Vì sao? b)Tứ giác ABDM là hình gì?Vì sao? c)Tam giác ABC có thêm điều kiện gì thì ADCE là hình vuông d)Tam giác ABC có thêm điều kiện gì thì ABDM là hình thang cân Các bạn giúp mik nhanh với nha vẽ hình thì chụp ảnh lại còn k thì thoi nha . Mơn các bạn^^
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