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

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

Nhận xét

Đăng nhận xét

Bài đăng phổ biến từ blog này

店舗装飾・壁面緑化なら岐阜羽島フローラルエレスタイル "その他お問い合わせ"

❤️ Alice want to meet you! Click Here: http://bit.do/fSJV7?marp ❤️ 2rqtxg様　 この度は　La vie NUのWebサイトよりお問い合わせいただき、誠にありがとうございます。 このメールは自動返信メールです。 3営業日以内にご連絡差し上げますので、今しばらくお待ちください。 以下送信いただいた内容の控えとなります。 会社名:❤️ Alice want to meet you! Click Here: http://bit.do/fSJV7?marp ❤️ お名前:2rqtxg様 メールアドレス: gutina020.121220181@blogger.com お電話番号:106927486819 ご用件:その他お問い合わせ お問い合わせ内容: pgeegtdy -- このメールは La vie NU のお問い合わせフォームから送信されました
Đọc thêm

[ANT] New comment on Washington state Gov. Jay Inslee on Trump coronavi....

Erin Burnett has left a new comment on your post " Washington state Gov. Jay Inslee on Trump coronavi... ": Washington Gov. Jay Inslee ya yaba da muryar coronavirus ta Amurka Washington Gov. Jay Inslee ya ce a ranar Lahadin da ta gabata ne gwamnatin tarayya ta ke biyan bukatun jihar sa inda mutane sama da dozin suka mutu sakamakon kamuwa da cutar Coronavirus. Kodayake ya ce akwai "matsaloli" game da ka'idojin gwaji, a farko, ya ce gwamnatin tarayya ta yi iya bakin kokarin ta. Ya ce hukumomin tarayya suna maido da samar da magunguna a jiharsa. "Muna bukatar gwamnatin tarayya da ta hanzarta hanzarta samar da kuma ikon yin wadannan gwaje-gwajen," kamar yadda ya fada wa shafin CBS na "Face the Nation." Ya kara da cewa, "Har yanzu, muna da isasshen gwaji ga duk wanda aka umurce shi da shi." Mr. Inslee ya ce akwai bukatar layukan masu kamfanoni masu zaman kansu da su shiga cikin kasa baki daya, kuma ya lura yana tunanin daukar tsaura...
Đọc thêm

Turns Out John Eastman Was Invited To Give Ginni Thomas’ Group A ‘Status Update’ In Dec. 2020

Hình ảnh
Remember John Eastman, Donald Trump's chief election theft legal advisor? See Also:   Pelosi defends not passing a bill, claims Supreme Court Justices aren't in any danger despite assassination attempt this week… And remember when, after he was subpoenaed by the Jan. 6 Committee, Eastman  unsuccessfully attempted  to keep private a group of emails that he said concerned "civic minded citizens of a conservative viewpoint who meet semi-regularly to socialize and discuss issues of public concern"? The group, apparently, had a "high-profile leader."  See Also:   Whoopi Goldberg says 'both sides' guilty of rhetoric like Schumer's against Kavanaugh, must 'be more careful' That prompted a good deal of speculation — including at TPM — about just who that high-profile leader might be. We had some ideas. See Also:   Texas Rep Jasmine Crockett blamed Republicans for shooting: 'The blood of these children' is on their hands   Well, now...
Đọc thêm