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pisces250299
2 năm trước
Cho tia Oz, Oy cùng nằm trên nửa mặt phẳng bờ chứa tia Ox, biết (xOy) ̂=50°,(xOz) ̂=130°. a, Trong ba tia Ox, Oy, Oz tia nào nằm giữa? b, Tính góc yOz? c, Vẽ tia Oa là tia đối của tia Oz. Tia Ox có phải là tia phân giác của góc yOa không? các bạn giải giúp mình nha mình cảm ơn trước các bạn
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