2.
Cho đường tròn (O; R), đường kính AB cố định và đường kính CD thay đổi. Tiếp tuyến
với đườ...
![subject](/tpl/images/cats/mat.png)
Mathematics, 19.06.2021 06:00 cwater7
2.
Cho đường tròn (O; R), đường kính AB cố định và đường kính CD thay đổi. Tiếp tuyến
với đường tròn (O) tại B cắt AC tại E, AD tại F. Tìm tập hợp trực tâm các tam giác CEF
và DEF.
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Answers: 3
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