user-avatar
haiduong190604
2 năm trước
Cho tam giác ABC có A=90° ; AB < AC ; phân giác BE, E thuộc AC. Lấy điểm H thuộc cạnh BC sao cho BH = BA. a) Chứng minh EH vuông góc BC. b) Chứng minh BE là đường trung trực của AH. c) Đường thẳng EH cắt đường thẳng AB ở K. Chứng minh EK = EC. d) Chứng minh AH // KC.
Thích Trả lời Chia sẻ

Các câu hỏi liên quan

Viết lại câu sao cho nghĩa không đổi:) 1, She said that they were quite smart and intelligent They....... 2, "If I were you, I would revise all my lessons carefully". She told me She advised.......... 3, Supposed that he hadn't completed his plan on time? What would........... 4, I regret telling her my secret I wish I............. 5, That is the town where I lived when I was a child .....in.... 6, "I am sorry I have broken your glass, Lan" He told Lan ......apologized..... 7, She is having him repaint her housse .......repainted..... 8, If he didn' pay the bill, he would be arrested Unless......... 9, If he had seen the accident, he would have phoned the police Had.......... 10, He sat down to write the letter as soon as he ha returned from his walk No sooner........... 11, That is the girl. Her test is excellent .....whose...... 12, They wanted to carpet to be mended by the tailor .....to mend.... 13, Though she was late, she wasn't punished by her boss .....her lateness..... 14, Does no one come here ? No one.......? 15, On watching a program on TV, he found his old friend When.............?

2018 © Loga - Không Ngừng Sáng Tạo - Bùng Cháy Đam Mê
Loga Team