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dinhnguyenvananh2002
6 năm trước

Trên cùng nửa mặt phẳng bờ chứa tia Ox , vẽ hai tia Oy và Oz sao cho góc xOy =40 độ , góc xOz =80 độ

a)Tính số đo góc yOz

b)Tia Oy có phải là tia phân giác của góc xOz ko vì sao

c)Vẽ tia Om là tia đối của tia Oy . Tính số đo góc xOm

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