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thanhphuong.bm2010
2 năm trước
1B.Trên cùng một nửa mặt phẳng có bờ chứa tia Ox, vẽ hai tia Ot và Oy sao cho xot=50 độ ;xoy=100 độ a) Trong ba tia Ox, Oy, Ot tia nào nằm giữa hai tia còn lại? Vì sao? b) Tính toy . So sánh xot với toy . c) Tia Ot có phải là tia phân giác của xoy không? Vì sao?
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