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tranbquynh12
2 năm trước
Vẽ góc bẹt xOy.Trên cùng nửa mặt phẳng bờ xy,vẽ xOt=150độ,xOm=30độ 1,Tính số đo mOt=? 2,Vẽ tia Oz là tia đối của tia Om. Tia Oy có phải là tia phân giác của zOt không ?Vì sao?
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