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tathai02101979
2 năm trước
cho hai góc kề nhau aÔb và aÔc sao cho aÔb = 35* và aÔc = 55*. Gọi Om là tia đối của tia Oc. a) tính số đo của góc aÔm và bÔm? b)gọi tia On là tia phân giác của góc bOm. Tính số đo góc aOn? c)vẽ tia đối của tia On là tia On' . tính số đo góc mOn
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