ta chia hinh chu nhat thanh so o vuong bang nhau la:

3x1=3 ( o vuong)

dien tich 1 o vuong la:

432:3=144(m)

vi 144=12x12 nen canh hinh vuong la 12m

chieu dai manh vuon la

12x3=36 ( m)

chieu rong manh vuon la

36:3=12(m)

chu vi la:

( 36 +12)x2=96(m)

dap so ...m

biển báo, biển trong bản đồ

1/ We are unable to see the stars in the sky. Light pollution occurs. (makes)

→ Light pollutions makes us unable to see the stars in the sky.

2/ Contamination in the air happens. There is acid rain which damages soil, vegetation and aquatic life of the region. (cause)

Contamination in the air causes the acid rain which damages soil, vegetarian and aquatic life of the region.

3/ Noise pollution is one of the major causes of stress and anxiety. People suffer from stress and anxiety. (because of)

People suffer from stress and anxiety because of noise pollution.

Không quy đồng tử số và mẫu số .Hãy so sánh :  a )   13 17   v à   15 19

My best friend is Lan. We have known each other since we were 10 years old. However we became best friends when we were at grade 7. At that time I was very bad at English and it was who helped me improve my English. Now she lives with her parents in Nguyen Trai street.

If I were to describe how she looks I would say she is very pretty. She has long black hair a straight nose and a small pointed chin. She is quite slim. She doesn t like to dress up so I usually see her wearing jeans and a T - shirt. She has a very nice personality and a wonderful sense of humour but she can also get a little depressed from time to time. I can always count on her to be honest and to give me the best advice.

What I like about Lan is that she has same hobbies with me. We both enjoy singing karaoke reading comic books and going shopping. We like going to the cinema but sometimes can t agree on which movie to see. In addition since I am better in Maths and Chemistry and she is better in English and languages we can always help each other if we get confused about a difficult homework assignment. We are so lucky that we get along so well. I hope that our friendship can last long.

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