[Trang Ánh Nam] New comment on Ôn thi Tuyển Sinh 10 - Phần Hình Học.

Nam Trang Ánh has left a new comment on your post "Ôn thi Tuyển Sinh 10 - Phần Hình Học":

Câu 5: [Quảng Ninh – 2016]
Cho nửa đường tròn (O) đường kính AB, trên nửa đường tròn lấy điểm C (C không trùng với A, B). Gọi H là hình chiếu của C trên đường thẳng AB. Trên cung CB lấy điểm D (D khác C, B), Hai đường thẳng AD và CH cắt nhau tại E.
a) Chứng minh tứ giác BDEH nội tiếp
b) Chứng minh AC.AC=AE.AD
c) Gọi (O') là đường tròn đi qua D và tiếp xúc với AB tại B. Đường tròn (O') cắt CB tại F khác B. Chứng minh EF // AB.


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Posted by Nam Trang Ánh to Trang Ánh Nam at December 25, 2018 at 3:01 AM

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