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walkingtohorizon
2 năm trước
cho Om là tia phân giác của xOy,tia On là tia đối của Om,biết nOx=100 độ a)Tính số đo các góc xOm,mOy,nOy b)chỉ ra các cặp góc bằng nhau.Các góc đó có đối đỉnh ko.Vì sao?
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