Mathematics, 23.07.2021 22:30 stinematesa
Trên 1 nửa mặt phẳng có bờ chưa tia Ox vễ 2 tia Oy và Oz sao cho góc xOy = 60 độ , góc xOz = 120 độ . a. Tính số đo góc yOz b. Gọi Ot là tia đối của tia Oy .Tính số đo góc của xOt c. Trên hình vẽ có tia nào là tia phân giác của 1 góc ? Vì sao ? Tia Ox là tia phân giác của góc zOt không ? Vì sao?
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Trên 1 nửa mặt phẳng có bờ chưa tia Ox vễ 2 tia Oy và Oz sao cho góc xOy = 60 độ , góc xOz = 120 độ...
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