Là 2018 chữ số 9 nha

What did you buy for your son on his 11th birthday?

Did he rent a new house in the city center?

Who helped u repair your bike yesterday?

Where did your family go to last summer vacation? 

When did your uncle move to HN?

Who arrived at the airport 15 minutes late last year?

When did Tom watch TV?(Câu này mik ko chắc lắm )

Why was she sad?

How did u go to school when u was 10 years old?

How long had she stayed there to study E?

1) What did you buy for your son on his 11 th birthday?

2) Did he rent a new house in the city center ?

3) Who  helped  you repair your bike yesterday?

4) Where did your family go to last summer vacation ?

5) When did your uncle move to Ha Noi?

6) Who arrived at the airport 15 minutes late last year?

7) When did Tom watch TV?

8) Why was she sad?

9)How did you go to school when you was 10?

10) How long did she stay there to study English?

có bài tập tự mà làm !

11. wonderful 

12. carefully

13. musical

14. roman

15. hopeless

16. fascinating

17. natural

18. educational 

19. pollution

20. national

hình bạn tự vẽ

a) xét tam giác ABM VÀ TAM GIÁC ACM

AB=AC (GT)

AM-CẠNH CHUNG

BM=CM(GT)

=>tam giác ABM = TAM GIÁC ACM

=> ^AMB=^AMC(2GT Ứ)

MÀ ^AMB+^AMC=180^o(kb)

=> ^AMB=^AMC=90^o

=> AM⊥BC

=> AM=PG ^BMC(3)

b) xét TAM GIÁC FAB VÀ TAM GIÁC EAC

FA=AE

^FAB=^EAC (Đ Đ)

AB=AC

=>TAM GIÁC FAB = TAM GIÁC EAC

=> CE=FB ( 2C TỨ)

VÌ AF=EA

=> TAM GIÁC FAE CÂN TẠI A 

=> ^AFE=^AEF=\(\frac{180^O-\widehat{A}}{2}\)(1)

XÉT TAM GIÁC ABC : AB=AC

=> TAM GIÁC ABC CÂN TẠI A

=> ^ABC=^ACB=\(\frac{180^O-\widehat{A}}{2}\)(2)

TỪ 1 VÀ 2 => ^AFE=^ABC 

MÀ 2 GÓC NÀY Ở VỊ TRÍ ĐỒNG VỊ CỦA FE VÀ BC

=>FE//BC

D)

XÉT TAM GIÁC BHM VÀ TAM GIÁC CHM

BM=CM(GT)

^BMH=CMH=90^o

HM - CẠNH CHUNG

=> TAM GIÁC BHM = TAM GIÁC CHM

=>^ HMB=^HMC

=> HM-PG ^BMC(4)

TỪ 3 VÀ 4

=> A, M, H thẳng hàng

a) Xét tg ABI và ACI có :

AB=AC( ABC cân tại A)

AI-chung

\(\widehat{AIB}=\widehat{AIC}=90^o\)

=> Tg ABI=AIC (ch-gn)

=> IB=IC

b) Có : \(IB=IC=\frac{BC}{2}=\frac{12}{2}=6cm\)

Xét tg ABI vuông tại I có :

AB²=AI²+IB²

=>10²=AI²+6²

=>AI=8cm

c) Có :\(\widehat{ABC}+\widehat{HIB}=90^o\)

\(\widehat{ACB}+\widehat{KIC}=90^o\)

\(\widehat{ABC}=\widehat{ACB}\)(ABC cân A)

\(\Rightarrow\widehat{HIB}=\widehat{KIC}\)

Lại có :\(\widehat{IHB}=\widehat{IKC}=90^o\)

IB=IC(cmt)

=> Tg IHB=IKC(ch-gn)

d) Có : MN//BC

\(\Rightarrow\widehat{MIB}=\widehat{IMN}\left(SLT\right)\)

và \(\widehat{KIC}=\widehat{INM}\left(SLT\right)\)

Mà :\(\widehat{HIB}=\widehat{KIC}\left(cmt\right)\)

\(\Rightarrow\widehat{IMN}=\widehat{INM}\)

=> Tg IMN cân tại I

Ý còn lại tự CM

#H

sáy ??

Fing a mistake and correct it:

1. The teacher says B will be a famous artist in one day.

=> The teacher says B will be a famous artist one day.

2.There was only a few people at the meeting last night.

=> There were only a few people at the meeting last night.

3. The driver of the car  was serious injured in the accident.

=> The driver of the car  was seriously injured in the accident.

4. The public library in the city has thousands of good books.

=> The public library in the city has thousand of good books.

5. Could you tell me where to get the souvenir shop?

=>  Could you tell me How to get the souvenir shop?

không sai

Mk nghĩ là bỏ "have"

Thành câu như sau:'I just decided to start working next week.'

Câu này mk nghĩ là sai do sự nhầm lẫn nghĩa các từ ghép lại với nhau, nếu mk sai bạn có thể góp ý giúp mk nhé!

HỌC TỐT!~