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nguyenthuan149
2 năm trước
Cho AOB = 50o, tia OC tia phân giác của góc. Gọi OD là tia đối của tia OC. Trên nửa mặt phẳng bờCD chứa tia OA, vẽ tia OE sao cho DOE = 25o. Tìm góc đối đỉnh với góc DOE \và giải thích tại sao.
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