Cho tam giác ABC vuông tại A. Vẽ AH vuông góc BC (H thuộc BC). Gọi I là giao của hai đường phân giác của các góc ABH và AHB. Gọi J là giao của hai đường phân giác của các góc ACH và AHC.

a) Chứng minh rằng IHJ = 90 độ

b) Tính tổng BIH+HIC

Cho tam giác ABC vuông tại A. Vẽ AH vuông góc BC (H thuộc BC). Gọi I là giao của hai đường phân giác của các góc ABH và AHB. Gọi J là giao của hai đường phân giác của các góc ACH và AHC.

a) Chứng minh rằng IHJ = 90 độ

b) Tính tổng BIH+HIC

1.    Not more than a thousand people live in the village, most

A thousand people ……………………………………………………… live in the village.

2.    In the film, the car explodes and we don’t know if Murray is alive or not. up

In the film, the car ……………………………………………………… and we don’t know if Murray is alive or not.

3.    There are lots of strange fish on the sea bed. bottom

There are lots of strange fish ……………………………………………………… the sea.

4.    The fire stopped burning in the middle of the night. out

The fire ……………………………………………………… in the middle of the night.

5.    Could you help me hang this ‘DO NOT LITTER’ sign? up

Could you help me ……………………………………………………… this ‘DO NOT LITTER’ sign?

6.    We need to increase people’s awareness about the environment. build

We need to …………………………………………………… people’s awareness about the environment

7.    One small sign isn’t going to stop people from entering the wood! keep

One small sign isn’t going to ……………………………………………………… of the wood!

8.    Please extinguish that cigarette right now! out

Please ……………………………………………………… that cigarette right now!

9.    Are you okay carrying that box or do you want to stop carrying it for a while? down

Are you okay carrying that box or do you want to ……………………………………………..for a while?

10.  Let’s tidy these clothes before Mum gets home. clear

Let’s ……………………………………………………… before Mum gets home.

1. You need to print the form out and sign it. You can send it to apply for the job. (ORDER)
-> _________________________________________________________________________________
2. The sun was shining. It wasn’t very warm. (THOUGH)
-> _________________________________________________________________________________
3. She had graduated from university. She volunteered to work in a hospital. (AFTER)
-> _________________________________________________________________________________
4. I lived in an apartment building. It had a very slow elevator. (WHICH)
-> _________________________________________________________________________________
5. Shirley has a 17-year-old daughter. The daughter’s ambition is to be a photographer. (WHOSE)
-> _________________________________________________________________________________
6. They couldn’t deliver the parcel. No one was there to answer the door. (SINCE)
-> _________________________________________________________________________________
7. The second race was easy. The first one was easier. (AS)
-> _________________________________________________________________________________
8. Brian didn’t mention anything about moving house. His wife didn’t, either. (NEITHER)
-> _________________________________________________________________________________
9. It was so hot. We didn’t leave the air-conditioned room all day. (THAT)
-> _________________________________________________________________________________
10. I don’t have a car. I really need one to travel around. (WISH)
-> _________________________________________________________________________________
 

1. They gave her the best treatment. They could not save her. (THOUGH)
-> ______________________________________________________________
2. You promise to pay me back. I will lend you some money. (AS LONG AS)
-> _________________________________________________________________________________
3. He has already delivered a good performance. Nobody can question his ability. (SINCE)
-> _________________________________________________________________________________
4. The car has a bad engine. I bought it last month. (WHICH)
-> _________________________________________________________________________________
5. They had always been in the London area. They moved here in 2009. (UNTIL)
-> _________________________________________________________________________________
6. The tornado was extremely powerful. It hit Minnesota. (THAT)
-> _________________________________________________________________________________
7. I am too old. I can’t play that kind of sport. (IF)
-> _________________________________________________________________________________
8. Over 200 people attended the ceremony. Many of them had known Harry as their teacher.
(WHOM)
-> _________________________________________________________________________________
9. Lisa hasn’t been to Italy before. Helena hasn’t been to Italy before, either. (NEITHER)
-> _________________________________________________________________________________
10. The building is too high. I can’t go to the top without an elevator. (TOO)
-> _________________________________________________________________________________
 

/7-2/X-1//=x-5

Mk đg cân gấp. TKS mn

tìm các số thực thỏa mãn 2x=3y=5z, x+2y+3z=300

Cho tam giác abc vuông tại A, đường cao AH, I là giao điểm 3 đg phân giác tam giác AHB, J là giao điểm 3 đường phân giác tam giác AHC. Đường thằng IJ cắt Ab tại M, Ac tại N. Đường thẳng HI cắt AB tại P, HJ cắt AC tại Q. 

a, CMR tam giác APQ vuông cân

b, CM AM=AN

Mk đg cần gấp. TKS mn