Nửa chu vi là:

280 : 2 = 140 ( m )

Tỏng so phần bằng nhau là:

3 + 4 = 7 ( phần )

Chiều dài là:

140 : 7 x 4 = 80 ( m )

Chiều rong là:

140 - 80 = 60 ( m )

ĐỀ 1

I: Choose the correct option A, B, C or D to complete the sentences.

1. Solar energy __________ by many countries in the world in the future.

A. use B. will use C. will be using D. will be used

2. __________ is a renewable sourse.

A. Coal B. Oil C. Wind D. Gas

3. You can wear a __________ on your back to fly anywhere easily in the future.

A. jet pack B. flying car C. teleporter D.high-speed bicycle

4. In the future most people will travel __________ flying train.

A. in B. at C. on D. at

5. Do you think we __________ driverless car in the future?

A. use B. to use C. will use D. have used

6. That picture is __________

A. us B. ours C. our D. we

7. ___________ is a single-wheel bike.

A. Monowheel B. Hover scooter C. Segwey D. Teleporter

8. Nuclear energy can provide electricity for the world needs, but it is __________

A. cheap B. unlimited C. dangerous D. safe

9. You can ___________easily on the Dead Sea. Why? – Because it’s so salty

A. fly B. walk C. drive D. float

10. Biogas helps solve the problem of indoor ___________.

A. noise pollution B. air pollution C. water pollution D. soil pollution

II. Find the word which has a different sound in the part underlined

1. A. new B. sew C. few D. knew
2. A. large B. hard C. carbon D. marry
3. A. tool B. blood C. spoon D. noon
4. A. report B. transport C. short D. power
5. A. plays B. wants C. looks D. helps
6. A. truck B. abundant C. nuclear D. dump
7. A. decided B. played C. listened D. enjoyed
8. A. biogas B. solar C. hydroelectric D. environment
9. A. pleasure B. meat C. heat D. beat
10. A. energy B. electric C. plentiful D. renewable

11. A. let B. jet C. vehicle D. success

I. Find the words which has a different sound in the part underline.

1. A. wanted B. filled C. stayed D. played

2. A. ahead B. instead C. seat-belt D. bread

3. A. left B. center C. enter D. frighten

4. A. wanted B. excited C. stayed D. visited

5. A. send B. ten C. lend D. the

II: Choose the correct option A, B, C or D to complete the sentences.

· Nuclear energy can provide electricity for the world needs, but it is __________

A. cheap B. unlimited C. dangerous D. safe

· You can ___________easily on the Dead Sea. Why? – Because it’s so salty

A. fly B. walk C. drive D. float

· Biogas helps solve the problem of indoor ___________.

A. noise pollution B. air pollution C. water pollution D. soil pollution

· In the future most people will travel __________ flying train.

A. in B. to C. on D. at

· Do you think we __________ driverless car in the future?

A. use B. to use C. will use D. have used

· That picture is __________

A. us B. ours C. our D. we

· ___________ is a single-wheel bike.

A. Monowheel B. Hover scooter C. Segwey D. Teleporter

· Solar energy __________ by many countries in the world in the future.

A. use B. will use C. will be using D. will be used

· __________ is a renewable sourse.

A. Coal B. Oil C. Wind D. Gas

· You can wear a __________ on your back to fly anywhere easily in the future.

A. jet pack B. flying car C. teleporter D.high-speed bicycle

11. The city is facing serious ____________ problems.

A. polluted B. polluting C. pollute D. pollution

12. “Hi, Bill. Congratulations!” “___________.”

A. I’m sorry B. Thank you C. My pleasure D. You’re welcome.

13. Peter never goes to school late, .................. he?

A. does B. did C. doesn’t D. didn’t

14. The actress arrived __________ a helicopter.

A. on B. in C. with D. by

III: Read the passage and tick () True or False.

Energy is one of the problems that many people are interested in. It is not an unfamiliar word. It is heard, said, discussed day after day. It is close to everyone’s daily life. You turn on a lamp and it is energy that gives you light. You turn on a TV and it is energy that gives you pictures and sound. You ride a motorcycle and it is energy that gives you movement. You cook your meals and it is energy that gives you heat to boil rice.

The problem is that the demand for energy is rising and that the price of energy is getting higher and higher. The supply of energy on earth is limited. It can not provide us forever. The shortage of energy in the future is inevitable. Therefore, saving energy is a must if we want to continue to live in a safe and sound world. ( familiar: thân thuộc/ demand: nhu cầu/ inevitable: chắc chắn xảy ra)

IV.Rewrite the sentences so that they have the same meaning as the original ones.

1. We planned to visit Petronas in the afternoon. We could not afford the fee.(however)

=>WE COULD NOT AFFORD THE FEE, HOWERVER WE PLANNED TO VISIT PETRONAS IN THE AFTERNOON,
2. We live in the same street. We rarely see each other. (in spite of)

=> IN SPTE OF LIVING IN THE SAME STREET, WE RARELY SEE EACH OTHER
3. I’ve been too busy to answer by email. I’ll do it soon. (nevertheless)

=> I'VE BEEN TOO BUSY TO ANSWER BY EMAIL, NEVERTHELESS I'LL DO IT SOON
4. We will use renewable energy in the future=> Renewable energy …………WILL BE USED IN THE FUTURE……………

5. This is our school

=> This school is ………OURS………….…

6.Did you often go to the beach when you lived in Nha Trang? =>Did you use .......TO GO TO THE BEACH WHEN YOU LIVED IN NHA TRANG....... ?
7. Tam doesn’t type as fast as she used to.

=>Tam used ………TO TYPE FASTER THAN SHE DOES NOW………..

V. Complete the sentences with the correct form of the adjectives in brackets.
1. I was very _INTERESTED_ in the lesson because our teacher is very__INTERESTING__ in history. (interest)
2. My friend is a very __RELAXED__ sort of person but he hates doing_RELAXING_ activities. (relax)
3. Studying for exams is very _TIRING__ I get _TIRED_ when I open my school books. (tire)
4. We were all very __EXCITED__ about the school trip but it wasn’t an__EXCITING__ trip at all. (excite)
5. It’s a __BORING___ book and I’m __BORED__ every time I start reading it (bore)

I: Choose the correct option A, B, C or D to complete the sentences.

1. This is Linda’s hat, and those shoes are _______________.
A. our B. hers C. her D. their
2. It will be ________________ to ride a jet pack in bad weather because it doesn’t have a roof.
A. comfortable B. pleasant C. unpleasant D. enjoyable
3. A sky safety system can help cars to _____________ traffic jams and crashes.
A. use B. have C. prevent D. take
4. The white cat is Helen’s, and the black cat is ________________.
A. I B. my C. mine D. of mine
5. We try to make the future green by using vehicles or kinds of energy that are ____________.
A. environmentally friendly C. environment friendly
B. environmentally friendship D. environmental friendly
6. Skycycling tubes will be easy_____________.
A. ride B. to drive C. drive D. to ride
7. I think we ______________ have electric taxis very soon.
A. may B. might C. will D. would
8. With teleportation, you disappear at a place, and then _______ in another place seconds later.
A. reappear B. reappears C. appears D. appeared
9. Every day over 1,000 new cars add to the city and the city of over 20 million people is getting more and more _____________.
A. difficult B. famous C. expensive D. gridlocked
10. My brother and I often come to school ___________ foot.
A. at B. in C. by D. on
11. With the Segway, the driver pulls the handle to go back or pushed it to go _________.
A. fly B. forward C. round D. backward
12. The Segway, which is a ____________ vehicle, will be a success.

A. two-wheels B. two wheels C. two wheel D. two-wheeled
13. Do you think the _____________ price will increase next month?
A. gases B. fossil fuel C. fuel D. natural gases
14. People won’t use flying cars ____________ the year 2050.
A. after B. before C. during D. until
15. Which _______________ of transport do you think will be used in the future?
A. mean B. means C. meanings D. meaning
16. . A jet pack doesn’t ____________ a lot of space.
A. occur B. bring C. take D. have
17. The city is facing serious _____________ problems.
A. pollution B. polluted C. pollute D. pollutant
18. We will use more _____________ energy in the future.
A. sun B. sunny C. solar D. sunlight
19. We are looking for types of vehicles that help us to avoid ____________.
A. walking B. traffic jams C. rush hours D. traffic
20. We believe that urban transport pods can travel __________ around 30kph.
A. in B. at C. with D. on

Đổi : 40 dm = 4 m

Diện tích xung quanh là:

( 4 + 3 ) x 2 x 6.5 = 91 ( m²)

Diện tích 1 đáy là:

4 x 3 = 12 ( m²)

Diện tích mép hàn là:

4 x 3 x 4% = 0.48 ( m²) 

Diện tích tôn là:

12 + 91 + 0.48 = 103.48 ( m²)

\(a^2-b^2-4a+4b\)

\(=\left(a+b\right)\left(a-b\right)-4\left(a-b\right)\)

\(=\left(a+b-4\right)\left(a-b\right)\)

Cho tam giác ABC nhọn, đường cao AH. Vẽ điểm D và E sao cho các đường thẳng AB, Ac lad các đường trung trực của DH và EH. Lấy điểm M, N lần lượt là giao điểm của DE với AB và Ac

a) Chứng minh AB= Ae

b)Chứng minh góc DAE bằng 2 lần góc MHB

c)Chứng minh AH, BN, CM đồng quy tại 1 điểm

cửa hàng còn lại số cam là:1-(1/3+3/8)=13/24

ban đầu cửa hàng có 46 quả cam có dư

sao lại côn người