[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 12: [Bình Dương – 2015 – 2016]

Cho tam giác ABC vuông tại A, M là trung điểm của cạnh AC. Đường tròn đường kính MC cắt BC tại N. Đường thẳng BM cắt đường tròn đường kính MC tại D.
a) Chứng minh tứ giác BADC nội tiếp. Xác định tâm O của đường tròn đó.
b) Chứng minh DB là phân giác của góc ADN.
c) Chứng minh OM là tiếp tuyến của đường tròn đường kính MC.
d) BA và CD kéo dài cắt nhau tại P. Chứng minh ba điểm P, M, N thẳng hàng.


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Posted by Nam Trang Ánh to Trang Ánh Nam at January 3, 2019 at 8:57 AM

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