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dieuphuong2511
2 năm trước
Trên cùng 1 nửa mặt phẳng bờ chứa tia Ox, về 3 tia Oy và Oz sao cho xOy=60° xoz =120° A. Trong ba tia Ox Oy Oz tia nào nằm giữa 2 tia còn lại. Vì sao B.tính số đo yOz C.vẽ tia Om là tia đối của tia Ox .tia Oz có phải tia phân giác của mOy k. Vì sao
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