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nguyenkhaccong812
2 năm trước
Trên nửa mặt phẳng bờ chứa tia Ox, vẽ các tia Oy, Oz, Ot sao cho: góc xOy= 40 độ, góc xOz= 60 độ, góc xOt= 100 độ Hãy tìm các cặp góc bằng nhau trong hình và chứng minh.
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