Cho ^{_{△ ABC}} có AB<BC. Tia phân giác góc ABC cắt cạnh AC tại D. Trên cạnh BC lấy điểm E sao cho BE=BA.

a/ Chứng minh: DA=DE

b/ Chứng minh: DA<DC

1.Put the conversation in the correct order then practice with your partner. The first and the last are your cue

A. Phuc: I think that "Adeline" is more interesting.

B.Phuc: Yes, sure. I'm free.

C.Mai: Let's me see. We have "Tomb of the Pharaoh Queen";"you are my grandma" and "Adeline". Do you love watching horrible movies or action movies?

D.Mai: Ok. See you soon.

E.Phuc: I will pick up at 7:00. By the way, lend me your English exercise book.

F.Phuc: I am hooked on horrible movies.

G.Mai: Would you like to go to see a movie?

H.Mai: Are you free tonight, Phuc?

I.Phuc: Yes, I'd love to. Which interesting movies are on?

J.Mai: Ok. So we'll see" Adeline" in Platinum Movie Center at 7:30pm.

K.Mai: That's interesting. Me,too. So we can choose "Tomb of the Pharaoh Queen" or " Adeline"

Your ansers:

A/ Puts the verbs in brackets in the correct verb form.

1. She (take)........ a lot of photos when she (go)....... on holidays.

2. My mother says when she (retire)............., she(go)..........back to her village to do the gardening.

3...........your sister(like)(make)............model in her free time?

4. My brother(promise)............ that he (give)............me a nice doll on my birthday.

5. My aunt (play) ........ the guitar once next week.

6. Don't worry. I (dance).......... with you next sunday.

Hình thức tiêu hóa mồi ở thủy tức có gì đặc biệt?

Cho hình vẽ sau, biết xAB+ABy=180

a) Tính xAB

b) Chứng minh Ax//By

c) chứng minh a vuông góc với By