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Loga2000tb
2 năm trước
Câu 6: Cho đường tròn (O) có hai đường kính AB và MN vuông góc với nhau. Trên tia đối của tia MA lấy điểm C khác điểm M. Kẻ MH vuông góc với BC (H thuộc BC). a) Chứng minh BOMH là tứ giác nội tiếp. b) MB cắt OH tại E.Chứng minh ME.HM = BE.HC. NÊU CÁCH LÀM CÂU B ( không cần giải chi tiết)
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