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onepunchman260704
2 năm trước
Cho nửa đường tròn `(O)` đường kính `AB` . Điểm `M` thuộc nửa đường tròn , điểm `C` thuộc `OA`. Trên nửa mặt phản ửng bờ `AB` chứa `M` vẽ tiếp tuyến `Ax,By`. Đường thẳng qua `M` vuông góc với `MC` cắt `Ax` và `By` lần lượt tại `P` và ``. `Am` cắt `CP` tạo `E`, `BM` căt `CQ` tại `F` `a,` Chứng minh `\hat{PCQ}=90^o` `b,` Chứng minh `AB////EF`
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