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tramdinhngothibang
2 năm trước
Câu 2: Trên cùng một nữa mặt phẳng bờ chứa tia Oa, vẽ hai tia Ob và Oc biết số đo góc aOb bằng 50 độ, số đo góc aOc bằng 100 độ. a) Tính số đo góc bOc. b) Vẽ tia Ot là tia đối của tia Ox. Tính số đo góc xOa. Mình cần gấp hôm nay. Mong các bạn giúp đỡ.
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