a) Xét tam giác ABI và tam giác ACI có:

AB = AC (gt)

AI là cạnh chung

\(\widehat{AIB}\)=\(\widehat{AIC}\)=90ĐỘ

\(\Rightarrow\)tam giác ABI và tam giác ACI (cạnh huyền - cạnh góc vuông)

\(\Rightarrow\)IB = IC ( 2 cạnh tương ứng )

b) Vì tam giác ABI và tam giác ACI(cmt)

\(\Rightarrow\)EB = FC ( 2 cạnh tương ứng)

Ta có: AE + BE = AB (gt)

        AF +  CF = AC (gt)

Mà AB = AC (gt)

      BE = CF (cmt)

\(\Rightarrow\)AE = AF 

  Xét tam giác AEI và tam giác AFI có:

   AE = AF (cmt)

   AI là cạnh chung

   \(\widehat{AEI}\)= \(\widehat{AFI}\)= 90 độ

\(\Rightarrow\)tam giác AEI và tam giác AFI ( cạnh huyền- cạnh góc vuông)

what do you usually do

we sing and dance

do you have a car

oh,yes.we eat fruit and cakes

nhớ tk nếu đúng

ko có nghĩa

Leds headlight : đèn pha led

It is Monday nhé.

             hok tốt.

It's Monday.

Write a meaningful sentence use given words

1. We/ should/ stop/ destroy/ forest / beacause/ they important/ environment

=> We should stop destroying forests because they are important to out the environment.

2. She/ suggest/ for/ work

=> She suggested I should go out for a walk.

3. I/ be/ write/ tell/ you/ my holiday/ Ha Long

=>I am going to write to tell you about my holiday  in Ha Long

4. She/ looking forward/ see/ boyfriend/ again

=> She is looking forward to seeing her boyfriend again.

5. Life expectancy/ craft village residents/ be/ lower/ rest of Vietnam

=> Life expectancy of craft village residents is lower than the rest of Vietnam.

What lessons have you got today ?

lessons nha 

Ok chưa ?????

Nhớ k nha

After classtime, they work in the bookshop.

After classtime , they work in the bookshop

snow nha

ANSWER:

Snow covers my house's roof.

...

Là makes nhé.

      hok tốt.

My mother always makes a cake for me on my birthday

lemonade nghĩa là nước chanh

Nước chanh là lemonade nha bạn!