Trang Ánh Nam has left a new comment on your post "Ôn thi Tuyển Sinh 10 - Phần Hình Học":
Câu 54: Cho tam giác ABC nhọn (AB<AC) nội tiếp d9uuong72 tròn (O;R), có đường cao AH. Từ H vẽ các đường thẳng vuôn góc với cạnh AB, AC lần lượt tại E, F.
a. Chứng minh rằng 4 điểm A, E, H, G cùng thuộc 1 đường tròn. Xác định tâm của đường tròn đó.
b. Chứng minh góc AEF = góc ACB = góc AHF
c. Giả sử AH=R. Chứng minh OF=FA, từ đó suy ra OA vuông góc với EF.
Unsubscribe from comment emails for this blog.
Posted by Trang Ánh Nam to Trang Ánh Nam at December 6, 2020 at 8:42 AM
Subscribe to:
Post Comments (Atom)
Popular Posts
-
Perfect Money ATM Debit Card Account Virtual Prepaid Cashout Anonymous bitcoin debit cards are intended for those clients who wish to burn t...
-
This is the madness of the Pitcairn market in the past 12 months, with law enforcement regulators trying to bring order into a world where t...
-
Buy Old Gmail Accounts Worldwide working ( GMAIL PVA ) Yes you can Buy Old Gmail Accounts Worldwide in bulk. We are offering 100% working an...
-
Fwd:Reminder Strategy Session at 631 Kati McMillon
-
Our systems are not compromised and this is not a breakthrough. All Malaysian Ringgit and Betcumin which we have in our custody are safe. Al...
-
Limited-time offer, buy now! ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏...
-
Erin Burnett has left a new comment on your post " Meghan McCain Defends Chris Matthews After MSNBC R... ": Whoopi Goldberg c...
-
Buy SEO Services You spend countless hours and money creating a beautiful website. And then you look every day, the site receives very littl...
-
Hello Exciting news!! Earn 36$ worth Bitcoin Black for free by registering to their Airdrop. No KYC required !! Get 3600 coins worth...
No comments:
Post a Comment