trên nửa mặt phẳng bờ chứa tia ox vẽ xoy =70 độ;xoz =35 độ a,tia nào nằm giữa 2 tia còn lại b,tia oz có là tia phân giác của góc xoy không?vì sao c,vẽ tia ot là tia đối của tia ox.vẽ tia om là tia phân giác của góc yot.tính zom

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