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kha.minhdo199
2 năm trước
Cho Ox và oy là hai tia đối nhau . Trên hai nửa mặt phẳng đối nhau bờ chứa tia Ox vẽ các tia om ,on sao cho góc XOM =75°, góc YON =75°. Chứng tỏ rằng OM ,ON là hai tia đối nhau Làm giúp mink với ạ thank
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