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tranminhlyna29
2 năm trước
trên cùng 1 nửa mặt phẳng có bờ chứa tia Ox , vẽ 2 tia Oy và Oz sao cho góc xOy=60độ ;xOz=110độ a/tia nào nằm giữa 2 tia còn lại?Vì sao? b/tính góc yOz? c/vẽ tia phân giác Om của góc xOy , tia phân giác On của góc yOz . Tính số đo góc mOn | cả hình |
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