Bài 1:
Cho △ABC có A = 90°. Đường thẳng AH vuông góc với BC tại H. Trên đường vuông góc BC tại B lấy điểm D không cùng nửa mặt phẳng bờ BC với điểm A sao cho AH = BD
a) Chứng minh rằng △AHB = △DBH
b) Hai đường thẳng AB và DH có song song không ? Vì sao ?
c) Tính ACB biết BAH = 35°
Bài 2:
Tính diện tính của miếng đất hình chữ nhật biết chu vi của nó là 70.4m và hai cạnh tỉ lệ với 4;7.
6. I ( collect ) ............................ stamps when I was a child.
7. Go Green (clean)........................ the beach a week ago.
8. We ( watch)......................this film several times.
9. Linh is my close friend. We ( know)....................each other for five years.
10. Lan enjoys ( collect ).................pens but she won't continue her hobby.
11. Last year, we ( win )..................the World Cup.
12. She ( travel )....................abroad when she is older.
13. Anna ( stop ).................dancing two years ago aften that car accident.
14. I think people ( not have )..................to go to work anymore in 2900.
15. I think ten years from now more people ( enjoy )gardening.
16/....................you ( go )..................cycling often?
17. On Sundays, we ( not have )......................to go to school.
18. Don't worry! He ( come ).................soon.
19. It...............( take ) me an hour to get to work. How long.................(it/ take )you?
20/..................... Minh and Hoa (go )......................to work by bus every day?
2 Practice: Give the correct jorm of the verbs
1. Hoa's dream is to become a chef. She always enjoy ( cook ) ....................... in her kitchen.
2. The baby often ( cry ) ………….…., at night.
3. Children need ( sleep)……………… more than adults.
4. I ( not/ take )……………….......up carving eggshells in the future.
5. They ( not come ) …………………… back to Dalat since last year