N
nghiemdung2011
![](https://blog.hocmai.vn/wp-content/uploads/2017/07/hot.gif)
![](https://blog.hocmai.vn/wp-content/uploads/2017/07/hot.gif)
cho tam giac ABC vuong goc tai A(AB>AC)
duong cao AH.Tren 1 nửa mặt phẳng bờ BC chứa điểm A,vẽ nửa đường tròn đường BH cắt tại E và nửa đường tròng đường kính CH cắt AC tại F
ch.m
a,tứ giác AEFH là hình chữ nhật
b,BEFC nội tiếp
c, AE.AB=AC.AF
THANKS NHIU`
TRA LOI NHANH SE PÓT CHO BAI` KHAC
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duong cao AH.Tren 1 nửa mặt phẳng bờ BC chứa điểm A,vẽ nửa đường tròn đường BH cắt tại E và nửa đường tròng đường kính CH cắt AC tại F
ch.m
a,tứ giác AEFH là hình chữ nhật
b,BEFC nội tiếp
c, AE.AB=AC.AF
THANKS NHIU`
TRA LOI NHANH SE PÓT CHO BAI` KHAC