user-avatar
lethithudiem154
2 năm trước
Cho tam giác ABC vuông tại A có đường cao AH, cho BH=4cm và BC=13cm. a/ Chứng minh: tam giác ABH đồng dạng với tam giác CAH. Tính độ dài đoạn thẳng AH. b/ Gọi E là điểm tùy ý trên cạnh AB, đường thẳng qua H và vuông góc với HE cắt AC tại F. Tìm vị trí của E trên AB để tam giác EHF có diện tích nhỏ nhất.
Thích Trả lời Chia sẻ

Các câu hỏi liên quan

Canadian Culture July 1st is Canada Day. Canada Day is the (26) ……… of the formation of the provinces into Canada, which was created in 1867. Canada became an (27) ………… territory of England back on July 1st, 1867. Canada Day is also a Statutory Holiday. Canadians across the country celebrate in many (28) ……… The Government of Canada sponsors fireworks displays and celebrations at city halls across the country. In Ottawa, at the Parliament Buildings there is a noon show with the Prime Minister and the Governor General in attendance to (29) ……… performances of Canadian musicians and singers. Events continue throughout the day. Many families go to parks and beaches and enjoy picnics and local events such as musical concerts, parades and fireworks. Many Canadians proudly (30) ………… the Canadian flag at parades to celebrate the birthday of the country. At many events, the National Anthem ‘O Canada’ is played and sung by everyone in attendance. For all Canadians, Canada Day marks the beginning of summer. (1 Điểm) Question 26. A. ceremony Question 26. B. party Question 26. C. celebration Question 26. D. occasion

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