user-avatar
HOANGHUY2K
2 năm trước
Cho Tam giác ABC vuông tại A. Biết góc C=30* . a) Kẻ BD là tia phân giác của góc ABC (D thuộc AC), kẻ DH vuông góc với BC(H thuộc BC). Chứng minh Tam giác ABD = tam giác HBD. b)Trên tia đối HD lấy điểm K sao cho H là trung điểm của DK. Chứng minh: BH là tia phân giác của góc DBK. c) Chứng minh BK// AC.
Thích Trả lời Chia sẻ

Các câu hỏi liên quan

Banh Chung and tet cake packages Banh Chung and Banh tet are an indispensable part of the cultural beauty of Vietnamese people, every year on Tet holiday from 27, 28, 29 Tet, every family sit around to pack Banh Chung cakes screech. In the South, there are Tet cakes, cylindrical cakes, in the North, there are square Banh Chung, although the shape is different the material is the same, rice is the main raw material of the cake, the cake represents the long-standing wet-rice culture of Vietnamese people. This tradition goes back to the time of Hung King and up to now, it cannot be changed in the cultural beauty of the New Year days, every family must pack a few dozen cakes to worship ancestors, give friends, Relatives often eat at Tet. At the time of wrapping Banh Chung, it is time to remember about their roots, people have more time to gather together, tell a story about an old year that has passed and hope for a full new year full of squares and cakes. the rounder, the square moon cake, the more the new year is full, prosperous and successful. Ai rút gọn bài này thành 1 đoạn ngắn (gom những ý chính dùm mik đi)

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