user-avatar
levanthuan21051983
2 năm trước
Tam giác ABC vuông ở A. D là trung điểm BC. M,N lần lượt là hình chiếu của D trên AB, AC. a) AMDN là hình gì? Vì sao? b) Đường cao AH của tam giác ABC. Chứng minh: góc MHN=90°.
Thích Trả lời Chia sẻ

Các câu hỏi liên quan

I am a teacher. My name is Ngoc Hoa. There are four people in my family. This is my father. He is a worker. He is fifty years old. This is my mother. She is forty years old. She is a doctor. She works in Viet Duc Hospital. That is my younger brother. He is fifteen years old. He is a student. We live in Ninh Binh city. Answer the question 1. How many people are there in Ngoc Hoa’s family? …………………………………………………………………………. 2. How old is her father? …………………………………………………………………………. 3. What does her mother do? …………………………………………………………………………. 4. Where do they live? …………………………………………………………………………. 5. Is her younger brother an engineer? ………………………………………………………………………….

V. REORDER SENTENCE 1. Mr Ba/ does/ How/ work/ to / to? …………………………………………………………………………. 2. in/ apartment/ Cuong/ lives/ an / Meo Vat town/ in. …………………………………………………………………………. 3. the/ To the left/ of/ there/ house/ a / is/ well. …………………………………………………………………………. 4. you/ on/ Which/ Monday/ classes/ have/ do? …………………………………………………………………………. 5. the/ are/ bookstore/ The/ in/ children. …………………………………………………………………………. 6. are/ you/ Where/ from? …………………………………………………………………………. 7. did/ she/ do/ last/ What/ week? …………………………………………………………………………. 8. is/ He/ teacher/ a. …………………………………………………………………………. 9. was/ born/ I/ 1999/ in. …………………………………………………………………………. 10. trees/ growing/ they/ in/ are/ garden/ the. ………………………………………………………………………

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