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cobelanhlung2007
2 năm trước
Bài 1: x/-16=-4/x Bài 2:Trên cùng 1 nửa mặt phẳng bờ chứa tia Ox vẽ góc xOy=70o,góc xOz=140o a)Trong 3 tia Ox,Oz,Oy tia nào nằm giữa 3 tia còn lại?Vì sao? b)Tính góc yOz c)Tia Oy có phải là phân giác của góc xOz không?Vì sao? d)Vẽ tia Om là tia đối của Ox.Tính mOz(Vẽ hình giúp em)
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