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thanhlasomotthegioi
2 năm trước
Trên nửa đường tròn đường kính AB lấy hai điểm P và Q sao cho P thuộc cung AQ . Gọi C là giao điểm của tia AP và tia BQ; H là giao điểm của hai dây cung AQ và BP . a. Tứ giác CPHQ có nội tiếp được một đường tròn hay không ? b.Chứng mình tam giác CBP đồng dạng với tam giác HAP ?
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