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dinhvan1562001
2 năm trước
Câu 4: Cho 2 tia Oy, Oz nằm trên nửa mặt phẳng có bờ là tia Ox sao cho góc xOy=75 độ, xOz=25 độ a) Trong 3 tia Ox, Oy, Oz tia nào nằm giữa 2 tia còn lại? b) Tính góc yOz c) Gọi tia Om là tia phân giác của góc yOz. Tính góc xOm Lưu ý: Có vẽ hình
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