Xem hình vẽ, cho biết a// b và ca

a) Đường thẳng c có vuông góc với đường thẳng b

không? Vì sao?

b) Cho đường thẳng d cắt hai đường thẳng a và b tại

A và B. Cho biết góc A₁= 115⁰.

        Tính số đo các góc B₂; B₃; A₃.

c) Gọi Ax và By lần lượt là tia phân giác của các góc

A₁ và B₃. Chứng minh: Ax //By.

l

k

V. Join each pair of sentences, using the word or phrase in brackets.
1. Hoa was born in Doc So craft village. She knows the process of making pottery.
(BECAUSE)
___________________________________________________________________________
2. The library was bombed. Many important historical documents were destroyed. (WHEN)
___________________________________________________________________________
3. She entered the room. She knew there was something wrong. (AS SOON AS)
___________________________________________________________________________

4. We decided to take rooms in Longwood House. We knew we could not afford the rent. (EVEN
THOUGH)
___________________________________________________________________________
5. My mom instructed me through 15 stages of making a conical hat. I could make one for me. (SO THAT)
___________________________________________________________________________
6. You want to knit a hat for your friend. You should watch tutorials on YouTube. (BEFORE)
___________________________________________________________________________
7. I was not enjoying the party. I wanted to leave early. (AS)
___________________________________________________________________________
8. I was cleaning out my cupboards. I found these photos. (WHILE)
___________________________________________________________________________
9. I went to Malaysia last year. I wanted to experience a whole new world. (IN ORDER TO)
___________________________________________________________________________
10. I attended a knitting workshop last Sunday. I don‟t know how to knit a scarf. (ALTHOUGH)
___________________________________________________________________________