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Vào Tkhđ của mik xem có ảnh ko nhé !

https://m.imgur.com/a/o7Vo0kL

 CHịu khó gõ link.onl đt bèn làm ntnày thôi nha

Ảnh trên không hiện rồi nhé !

*Bạn tự vẽ hình ra nhé!*

Vẽ điểm K sao cho D là trung điểm của GK ta tính được BK=CG=10; BG=6; GD=4; GK=8

\(\Delta\)BGK có 3 cạnh bằng 6;8;10 nên

\(\widehat{BGD}=90^o\)(định lý Pytago đảo)

\(BD^2=BG^2+GD^2=6^2+4^2=52\)

\(\Rightarrow BD=\sqrt{52}\Rightarrow BC=2\sqrt{52}\approx14,4cm\)

đó nha bn

1, choose the best answer and circle it

1, She used to __________ work by motorbike . Now she cycles

A, doing             B, does            C, do

2, They watched film on DVD all night, ________ having to work the next day

A, However            B, Although             C, In spite              D, Despite

3, The play was so boring __________ An saw if from beginning to end

A, therefore          B, Despite             C, However           D, Although

4, She's sure that they will find the film __________.

A, entertaining             B, entertain           C, entertainment           D, entertained

5, Do you seeing a film ? - "____________"

A, No, I don't it at all                    B, Sure. What film shall we see ?

C, Who is in it ?                                  D, I'm sorry, I can't 

6, ________ being frightened by the images, Lan still d the films so much.

A, In spite             B, Despite                 C, Although             D, Nevertheless

7, __________ is La Tomatina celebrated ? - Every August

A, Where              B, Why                   C, When                  D, Which

8, My father d the ___________ of the singer

A, perform              B, performer                 C, Performance                    D, performing

1, My sister used to live in a small village.

2, There didn't use to be many traffic accident before.

3, Does he ususally go fishing on Saturday ?

4, My brother used to go to work by motorbike. Now he cycles.

5, How about seeing a movie on Sunday evenning ?

6, An used to play football in the afternoon.

7, Nam has learnt English for 8 years.

8, Last night, my father watched TV.

9, Ba will visit to Ha Long Bay this summer vacation.

#chúc_bạn_học_tốt

noooooooooooooooooooooooooooooo