Cho tam giác \(ABC\) vuông tại \(A,\) chiều cao \(AH\). Chọn câu sai.
\(A{H^2} = BH.CH\)
\(A{B^2} = BH.BC\)
\(\dfrac{1}{{A{H^2}}} = \dfrac{1}{{A{B^2}}} + \dfrac{1}{{A{C^2}}}\)
\(AH.AB = BC.AC\)
Ta thấy \(AH.BC = AB.AC\) nên D sai.
Tính \(CD\)?
Tính \(CE.\)?
Tính \(BE\)?
Tính \(BE;CE\).
\(BE = \dfrac{{125}}{7}\,\,;\,\,CE = \dfrac{{100}}{7}\)
\(BE = \dfrac{{125}}{7}\,\,;\,\,CE = \dfrac{{75}}{7}\)
\(BE = \dfrac{{75}}{7}\,\,;\,\,CE = \dfrac{{100}}{7}\)
\(BE = \dfrac{{100}}{7}\,\,;\,\,CE = \dfrac{{125}}{7}\)
Giải tam giác \(ABC\)
Cho mình hỏi các câu này làm sao ạ?
1.I think we shouldn't buy that car.
->Let's
2.I suggest those products shouldn't be bought.
->I suggest
3.Let's take these bottles to a recycling center.
4.How about replacing the broken window,
->I suggest the
5.Please don't leave the light on during the night.
->I suggest that
6.Flowers won't bloom if there isn't enough water.
->Unless flowers
7.If you don't succeed you will have to try it again.
->Unless you
8.The weather was really bad, so we decided to postpone our camping.
->Since
9.Even thought he had a car, he still bought a new one.
->He had
10.The boy drove carelessly,so he caused the accident.
11. Despite not feeling well he tired to finish the word.
->Even
12.They tired hard,but they couldn't win the match.
->Despite
13.He is humorous and generous, so we all love him.
->Because of
Trình bày suy nghĩ của em về hiện tượng vứt rác bừa bãi trong trường học khoảng 10 dòng( không lấy trên mạng nha😗) cảm ơn ạ.
-Nêu từ " Asean 6" phát triển thành " Asean 10".
- ngắn gọn ko cần giải thích đâu ạ.