Bài 4: (2 điểm) Cho  có cạnh BC = 7cm, AB < AC. Trên tia CB lấy điểm O sao cho CO = 3cm.

            a) Tính độ dài đoạn thẳng BO

            b) Nối O với A, giả sử  . Tính số đo

            c) Trên nửa mặt phẳng chứa A có bờ là tia OC xác định tia Oy sao cho , tia Oy cắt AB tại E. Chứng minh rằng: OE là tia phân giác

Ex6.: viết dạng so sánh hơn hoặc so sánh nhất của tính từ trong ngoặc

1. My house is(big).....................................................than yours.

2. This flower is(beautiful)..................................................than that one.

3. This is the(interesting)..................................................book I have ever read.

4. Non-smokers usually live(long).... .............................................than smokers.

5. Which is the(dangerous)... ...............................................animal in the world?

6. A holiday by the sea is(good).... ...............................than a holiday in the mountains.

7. It is strange but often a coke is(expensive)... ...... .........................................than a beer.

8. Who is the(rich)....... ...........................................woman on earth?

9. The weather this summer is even(bad)...... ............................................than last summer.

10. He was the(clever).... .............................................thief of all.

11. Dogs are(intelligent)...... ........................................than rabbits

12. Lucy is(old)....... .......................................than Ellie.

13. Russia is far(large).... .........................................than the UK.

14. My Latin class is(boring)...... ........................................than my English class.

15. In the UK, the streets are generally(narrow).... .........................................than in the USA.

16. London is(busy)... ...........................................than Glasgow.

17. Julie is(quiet)....... .......................................than her sister.

18. Amanda is(ambitious)...... ........................................than her classmates.

19. My garden is a lot(colourful)....... .......................................than this park.

20. His house is a bit(comfortable).... ..........................................than a hotel.