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hoangminhdat
2 năm trước
Giúp mình giải với nhớ vẽ hình nha Cho góc nhọn AOB , vẽ BOC , AOD là 2 góc kề bù với AOB . Chứng tỏ : a) BOC , AOD , là 2 góc đối đỉnh . B) Hai tia phân giác BOC , AOD là 2 tia đối nhau .
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