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tn3929718
2 năm trước
Cho h.thang ABCD(AB//CD)có AB=7,5cm;CD=12cm.Gọi M là trung điểm của CD,E là giao điểm của Ma và BD,F là giao điểm của MB và AC. a)Cm:EF//DC b)Tính EF Giúp mình với,cả hình nha,mình sẽ Vote đủ
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