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Ta có: \(AN=\dfrac{AB}{2}\)(N là trung điểm của AB)

\(AM=\dfrac{AC}{2}\)(M là trung điểm của AC)

mà AB=AC(ΔABC cân tại A)

nên AN=AM

Xét ΔABM và ΔACN có 

AB=AC(ΔABC cân tại A)

\(\widehat{BAM}\) chung

AM=AN(cmt)

Do đó: ΔABM=ΔACN(c-g-c)

Suy ra: BM=CN(hai cạnh tương ứng)

27 tháng 2 2021

Ta có △ABC cân tại A ⇒ ∠ABC = ∠ACB ( 2 góc ở đáy )

M là trung điểm của AC ⇒ AM = MC =  \(\dfrac{1}{2}\) AC

N là trung điểm của AB ⇒ AN = NB =  \(\dfrac{1}{2}\) AB

⇒ AM = MC = AN = NB.

Xét △BNC và △BMC có:

+) BC chung

+) BN = CM (cmt)

+) ∠ABC = ∠ACB ( cmt )

⇒ △BNC = △BMC ( c- g- c )

⇒BM = CN ( 2 cạnh tương ứng )

9 tháng 1 2022

1. Yesterday, I (go) went to the restaurant with a client.

2. We (drive) drove around the parking lot for 20 mins to find a parking space.

3. When we (arrive) arrived at the restaurant, the place (be) was full.

4. The waitress (ask) asked us if we (have) had reservations.

5. I (say) said, "No, my secretary forgets to make them."

6. The waitress (tell) told us to come back in two hours.

7. My client and I slowly (walk) walked back to the car.

8. Then we (see) saw a small grocery store.

9. We (stop) stopped in the grocery store and (buy) bought some sandwiches.

21 tháng 3 2020

1.went

2.have driven

3.walked

4.arrived/ was

5.saw

6.was

7.didn't go

8.stopped/ bought

9.have loved

10.got/ has

21 tháng 8 2017

Use the past form of the verbs:

1.Yesterday, i(go) __went___ to the restaurant with a client

2.We( drive) ___drove__ around the parking lot for 20 mins to find a parking space

3.When we( arrive) _arrived___ at the restaurant , the plake( be) _was__ full

4.The waitress( ask) ___asked____ us if we( have) _had__reservations

5.I(say) __said___ , "no, my secretary forgets to make them ''

6.The waitress( tell) __told__ us to come back in two hours

7.My client and i slowly( walk) ___walked__back to the car

8. Then we( see) _saw___ a small grocery store

9. We( stop) __stopped__ in the grocery store and( buy) __bought___ some sandwiches

10. That( be) _was___ better then waiting for two hours

21 tháng 8 2017

thanks ♡♡♡yeu♡♡♡

24 tháng 6 2018

went

drove

arived

was

asked

had

said

told

walked

saw

stoped

bought

was

did

got

did

did

loved

got

had

1 tháng 1 2018

1. drove

2.arrived- was

3.asked - had

4. sayed 

5.told

6.walked

7.saw

8.stopped - bought

9.was

     Có mấy câu mk không chắc nx nha ><

1 tháng 1 2018

cậu làm giống mình đấy!!!

6 tháng 1 2022

We (drive) ___have driven___ around the parking lot for 20 mins to find a parking space.

 
13 tháng 8 2016

Chia động từ : 

1)Steve ( smoke) .....smokes... 10 cigarettes 

2)Food (cost ) ..cost.... a lot of people 

3)Marconi ( invent) .....invents.....radio

4)I (say) say, No,my secretary forgets to make them 

5)The waitress (tell) ...tell.... us to come back in two hours 

6) when we (arrive .......arrive.....at the restaurant,the place (be) ...are....full

7)Then we (see) .....see.......a small grocery store 

8)The waitress (ask)......ake.....us if we (have) have  reservations 

9) we ( drive).....drive..... around the parking lot for 20 mins to find a parking spa 

10)we ..think....the food was delicious (think) 

13 tháng 8 2016

1)Steve ( smoke) ...smokes..... 10 cigarettes 

2)Food (cost ) ...cost.. a lot of people 

3)Marconi ( invent) .....invents.....radio

4)I (say) say , No,my secretary forgets to make them 

5)The waitress (tell) ....tell... us to come back in two hours 

6) when we (arrive .....arrive.......at the restaurant,the place (be) ...are....full

7)Then we (see) .....see.......a small grocery store 

8)The waitress (ask).....ake......us if we (have) have reservations 

9) we ( drive)....drive...... around the parking lot for 20 mins to find a parking spa 

 

10)we ...think...the food was delicious (think) 

 

23 tháng 6 2018

1. Yesterday, I (go) went to the restaurant with a client.

2. We (drive) drove around the parking lot for 20 mins to find a parking space.

3. When we (arrive) arrived at the restaurant, the place (be) was full.

4. The waitress (ask) asked us if we (have) had reservations.

5. I (say) said, "No, my secretary forgets to make them."

6. I (not go) didn't go to school last Sunday.

7. Did She (get) get married last year ?

8. What did you (do) do last night? - I (do) did my homework.

23 tháng 6 2018

1.Yesterday , I ( go )went to the restaurant with a client.

2.We ( drive )have driven around the parking lot for 20 minutes to find a parking space.

3.When we ( arrive )arrived at the restaurant, the place (be)was full.

4. The waitress ( ask )asked us if we ( have )had reservation.

5.I ( say )said : " No , my secretary forgets to make them ".

6. I ( not go )didn't go to school last Sunday.

7.Did She ( get )get married last year ?

8.What did you ( do )do last night ? I ( do )did my homework.

Eg: They/ wear suits to work? " Do they wear suits to work?1. she/ not/ sleep late on weekends ".............................................................................2. we/ not/ believe/ ghost".............................................................................................3. you/ understand thequestion?".................................................................................4. they/ not/ work late on Fridays...
Đọc tiếp

Eg: They/ wear suits to work? " Do they wear suits to work?

1. she/ not/ sleep late on weekends ".............................................................................

2. we/ not/ believe/ ghost".............................................................................................

3. you/ understand thequestion?".................................................................................

4. they/ not/ work late on Fridays  "…………………………………………………..

5. David/ want some coffee? "…………………………………………………….

6. she/ have three daughters "…………………………………………………….

7. when/ she/ go to her Chinese class? "………………………………………….

8. why/ I/ have to clean up"……………………………………………………….

: Supply the correct form of the verb in the past simple.

1. Yesterday, I (go)______ to the restaurant with a client. 

2. We (drive) ______ around the parking lot for 20 mins to find a parking space. 

3. When we (arrive) ______ at the restaurant, the place (be) ______ full. 

4. The waitress (ask) ______ us if we (have) reservations. 

5. I (say), "No, my secretary forgets to make them." 

6. The waitress (tell)______ us to come back in two hours. 

7. My client and I slowly (walk) ______ back to the car. 

8. Then we (see) ______ a small grocery store. 

mình ngu tiếng anh nên giúp vs 

2
2 tháng 4 2020

giúp vs

2 tháng 4 2020

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