Chủ đề:
Ôn tập: Tam giác đồng dạngCâu hỏi:
cho tam giác ABC vuông tại A, đường cao AH.
a, CM: AH.BC= AB.AC
b, gọi BE là tia phân giác của góc ABC; BE cắt AH tại D. Chứng minh: tam giác ABD đồng dạng với tam giác CBE
c. CM: AE.BH=BA.DH
1. It is your responsibility to make sure of the time to leave. ->You are................................................................. ( FOR) 2.I think we should go home. ->It is......................................................................(ABOUT) 3.This is problem can not be solved instantly. ->There is............................................................(INSTANT) 4.He is finding it easier to work at night. ->He is..............................................................(GETTING) 5.You have disobeyed, you will there for be punished. ->As a result of................................................................(YOUR) 6.The movie theater was full. ->There.......................................................................(NO) 7.Do you and your brother have the same looks? ->Do you............................................( LIKE) 8.Few languages are as difficult as Chinese and Japanese. ->Chinese and Japanese....................................(TWO)