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tinkhoitin09012002
2 năm trước
: Cho hình chữ nhật ABCD có chiều dài AB gấp rưỡi chiều rộng Bc. Lấy một điểm M trêncạnh BC sao cho MB = 2MC. Nối AM kéo dài cắt DC tại điểm E .Nối B với E .Nối D với M a, So sánh diện tích tam giác MBE và MCD b,Gọi O là giao điểm của AM và BD. Tính tỉ sốOB/OD
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