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tuananh1995
2 năm trước
Bài 1: Cho hai góc kề bù góc AOB; góc AOD; biết góc AOB = 2 góc AOD 1) Tính góc AOB; góc AOD 2) Trên nửa mặt phẳng bờ chứa đường thẳng BD vẽ tia OE sao cho góc EOB = 60độ . Chứng tỏ: OA và OE là hai tia đối nhau
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