Vì \(AM\perp AH\left(gt\right)\)(1)

và \(BC\perp AH\left(gt\right)\)(2)

Từ(1) và (2)

\(\Rightarrow AM//BC\)(T/c )

Mà \(EF//BC\)(* )

Do \(\widehat{AEF}=\widehat{ABC}\)(do vị trí đồng vị )'

\(\Rightarrow AH\perp EF\)(*)

Mà \(AM\perp AH\left(gt\right)\)(** )

Từ (*) và (** )

\(\Rightarrow AM\perp EF\)

( đpcm)

No, I do not hate you

kb nhé

bạn có ghét tôi ko ? 

trả lời : yes i do

1, It is known that the telephone introduced 1876 by bell and watson

The phone is known that it was introduce in 1876

2, She would rather not to take part in this festival

3, He is not used to driving in traffic every day 

4, I suggest using gas instead of burning coal

học tốt

1, It is known that the telephone introduced 1876 by bell and watson

The phone is known that it was introduce in 1876

2, She would rather not to take part in this festival

3, He is not used to driving in traffic every day 

4, I suggest using gas instead of burning coal

Urng hộ nhé ~~~!! ^^ :3

...:is said to die of a broken heart

 people say that Little Pea 's father died of a broken heart

-> Little Pea' father dies of a broken heart

1+1-1+1-1x1= 2-1+1-1=1+1-1=2-1=1

k mk nha

1+1-1+1-1×1

=1+1-1+1-1

=2-1+1-1

=1+1-1

=2-1

=1

Trả lời : 

    i need time là tôi cần thời gian 

chúc bn hok tốt

Tôi cần thời gian

Complete the questions with did, was or were and answer the quiz  

                                                                           IMPORTANT FIRSTS
1. Where was the first female police officer from ?

a . London                                              b . Los Angeles                                                  c . Rome

2. Toy Story was the world's first 100% computer generated movie. When did it come out ?

a . in 1990                                              b . in 1995                                                          c . in 2000

3. Where were the world's first trafic lights ?

a . Australia                                           b . in Germany                                                   c . in the USA

4. Where were the first World Cup finals of the twenty - first century ?

a .  in Argentina and Chile                      b . in Japan and Korea                                       c . Portugal and Spain

1. Where .......... the first female police office from ?       

     B:. Los Angeles               

     2. Toy Story was the world's first 100% computer generated movie. When ......... it come out ?              

B : In 1995

3. Where ........ the world's first trafic lights ?

A: Australia

4. Where ............ the first World Cup finals of the twenty - first century ?

B : In Japan and Korea

1, was

2,did

3,was

4,were

1. Where ......... the first female police officer from ?

a . London                                              B: . Los Angeles                                                  c . Rome

2. Toy Story was the world's first 100% computer generated movie. When ........... it come out ?

a . in 1990                                              B: . in 1995                                                          c . in 2000

3. Where ........ the world's first trafic lights ?

A: China                                                 b . in Germany                                                   c . in the USA

4. Where ............ the first World Cup finals of the twenty - first century ?

a .  in Argentina and Chile                      B: . in Japan and Korea                                       c . Portugal and Spain

1. is knocking  / will come  / have just wash 

2. Are ... going to do  

  am going 

3. Will have  / will catch 

4.  Don't do 

5. Causes 

6. introduced 

(1) broke down (2) turn back (3) check in (4) get on (5) took off (6) get off (7) got off