Bài 7: Cho tam giác ABC cân ở A. Trên AB lấy M, trên tia đối của CA lấy N sao cho BM=CN. Gọi K là trung điểm của MN. CM 3 điểm B,K,C thẳng hàng (ít nhất 2 cách)

Bài 1: Cho tam giác ABC có AB=AC. Gọi M là trung điểm cuả BC.

a) Chứng minh AM vuông góc BC

b)Vẽ hai đường tròn tâm B và tâm C có cùng bán kính sao cho chúng cắt nhau tại P và Q. Chúng minh 3 điểm A,P,Q thảng hàng ( ít nhất 3 cách)

Ex1: Complete the second sentence so that it has the similar meaning to the first one.

1. They will widen the road to our village next year.

=> The road

2.I think you should go to work by bike.

=> Why don't

3.We will plant more trees along this street.

=>more trees

4. He got the first prize at the competition. His mother is very happy.

=> His mother

5. Mr Hung lived in the country when he was a child.

=> Mr Hung used

6. They sell these chemicals everywhere in my hometown.

=> These chemicals

7. You forgot to turn off the TV last night, didn't you?

=> You didn't remember

8. Is pollution the most serious problem?

=> Pollution is

9. They will build a new school for poor children next month.

=> A new school

10.Some people will interview the new president on TV

=> The new president

Ex1:Give the correct form of the verbs in the brackets to complete the sentences

1.Ted and Amy(to answer) the phone if his wife (to have)...........a bath.

3.If Claire...............(to wear) this dress at the party, our guests...........(not/to stay) any longer

4.They........(not/ to survive) in the desert if they..........( not/ to take) extra water with them

5.You.............(to cross) the Channel if you...........(to fly) from Paris to London

6.I.............(to remember) you if you...............(to give) me a photo

7.If you.............(to press) CTRL+S, you .............(to save) the file.

8.He ..........(not/to understand) you if you (to whisper).........

9.If we ................(to send) an invitation, our friends................(to come) to our party

10.At last the bus came. We(to wait)............. for half an hour.

11.Im feeling sick. I( to eat).............so much chocolate last night

12.If I............(to touch) this snake, my girlfriend............(not/ to scream)

13.I think the weather (to be)............. nice later

14.I(to turn)...............the dishwasher on when heard the shot

15.She.............(to forget) to pick you up if you...........(not/ to phone) her.