Cho tam giác ABC vuông tại A có đường cao AH chia cạnh huyền BC thành 2 đoạn: BH = 4 và HC = 6 cm

a) tính độ dài AH, AB, AC

b) Gọi M là trung điểm của AC. Tính số đo góc AMB 

Exercise:Combine two following sentences into one

1.I was looking for a book this moring.I have found it now

\(\rightarrow\)

2.Mrs.Smith does volunteer work at the hospital.She is retired teacher

\(\rightarrow\)

3.I live in a dormitory. Its residents come from many countries

\(\rightarrow\)

4.Lake Prespa is a lonely beautiful lake.It is on the north Greek border

\(\rightarrow\)

5.The little girl ate candy the whole way.She sat next to me on the beach

\(\rightarrow\)

Viet lai cau sao cho nghia ko doi

1. I think it's time for you to start revising for the coming exam

\(\rightarrow\) I suggest

2. It is believed that his father died in a car accident.

\(\rightarrow\)His father

3. It's a pity I can't play the guitar well.

\(\rightarrow\)I wish

4. "I'm leaving here for Hue tomorrow" she said

\(\rightarrow\)she said

5. Although that exercise was difficult, my brother could do it quickly

\(\rightarrow\)No matter

Bài tập :Viết lại những câu sau sao cho nghĩa của câu không thay đổi.Dùng câu điều kiện

1.That man doesn't work hard.He can't earn more money

\(\rightarrow\).....................................................................................

2.I don't tell him the answer because he is from home

\(\rightarrow\).................................................................................

3.My friend and I don't have enough money,so we will not buy a house of our own.

\(\rightarrow\)................................................................................................................................

4.The weather isn't better now, so we can't go for a walk

\(\rightarrow\)....................................................................................

5.I don't know his address, and I don't give it to you

\(\rightarrow\)................................................................................

6.He does not work slowly enough, so he makes many mistakes

\(\rightarrow\)...................................................................................................

7.I am not sent to prison.She doesn't visit me

\(\rightarrow\)...................................................................

8.I don't win a big prize in a lottery, so I don't give up my job

\(\rightarrow\)................................................................................................

9.The doctor can't see many patients because he is so late

\(\rightarrow\).......................................................................................

10.We don't visit them in Hanoi because tickets are expensive

\(\rightarrow\).............................................................................................