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phiếu
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toán 9

B1) Cho $(O)$ đường kính $AB=2R$ và điểm C thuộc đường tròn (C khác $A,B)$. Lấy D thuộc dây $BC ( D$ khác $B,C)$. Tia AD cắt cung nhỏ BC tại E,...
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phiếu
1đáp án
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Trong các tam giác có chu vi là 54 hãy tìm tam giác có chu vi đường tròn nội tiếp lớn nhất

trong các tam giác có chu vi là 54 hãy tìm tam giác có chu vi đường tròn nội tiếp lớn nhất

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