tuanvuongmanh2008 tuanvuongmanh2008
  • 20-05-2023
  • Mathematics
contestada

cho đường tròn tâm o dây ab cố định không đi qua O đường kính CD vuông góc với ab tại H(C thuộc cung lớn ab) điểm M di chuyển trên cung nhỏ AC(M khác A và M khác C) . đt CM cắt ad tại N .Nối MD cắt AB tại E /Chứng minh CMEH là tgnt

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