Làm hộ mk câu D bài 3 vs ạ

Bài 9: Cho tam giác ABC cân tại A. Trên tia đối của tia BC lấy điểm M, trên tia đối của tia CB lấy điểm N
sao cho BM = CN.
a) Chứng minh rằng tam giác AMN là tam giác cân
b) Kẻ BH ⊥ AM (H ∊ AM), kẻ CK ⊥ AN (K ∊ AN). Chứng minh rằng BH = CK
c) Chứng minh rằng AH = AK
d) Gọi O là giao điểm của HB và KC. Tam giác OBC là tam giác gì? Vì sao?
Bài 10: Cho tam giác ABC vuông tại A có AB = 6cm; AC = 8cm.
a) Tính độ dài đoạn thẳng BC
b) Vẽ tia phân giác BD của góc B. Từ D kẻ DE BC ⊥ tại E.
Chứng minh  =  ABD EBD
c) Chứng minh: Tam giác ABE là tam giác cân
Bài 11: Cho ABC vuông tại A. BE là tia phân giác của góc ABC (E AC .  ) Kẻ EI BC ⊥ (I BC .  )
a) Chứng minh  =  ABE IBE
b) Tia IE và tia BA cắt nhau tại M. Chứng minh EMC cân
c) Chứng minh AI // MC
Bài 12: Cho ABC vuông tại B (AC AB .  ) D là điểm thuộc AC sao cho AB = AD. Kẻ AH BD ⊥ tại
H, AH cắt BC tại E.

 =  ABH ADH
EBD BED 120 , = o AB 2cm. = Bài 13: Cho ABC vuông tại C có A 60 = o và đường phân giác của BAC cắt BC tại E. Kẻ EK AB ⊥
tại K (K AB .  ) Kẻ BD AE ⊥ tại D (D AE .  ) Chứng minh:

 =  ACE AKE Bài 14: Cho tam giác ABC cân tại A. Kẻ BE, CF lần lượt vuông góc với AC và AB (E AC F AB   , )
a) Chứng minh  =  ABE ACF
b) Gọi I là giao điểm của BE và CF. Chứng minh BIC cân
c) So sánh FI và IC
d) Gọi M là trung điểm của BC. Chứng minh A, I, M thẳng hàng.
Bài 15: Cho tam giác ABC cân tại A có BAC = 1200 . Lấy D E , bên cạnh BC , sao BAD CAE = = 300 .

DAB DAE

Giúp mk 20 câu trắc nghiệm này nha

XI. Combine two sentences into a new one using the given words in brackets. Do not change the given words in any ways.

1. He bought many English books, but he didn’t speak English well.   (Nevertheless)

…………………………………………………………………………………

2. She worked very hard. She could not please her step-mother.         (However)

………………………………………………………………………………

3. He often wrote the letters to his friends when he was a child.             ( used to )

…………………………………………………………………………………

4. My children often walked to school last year.                                    ( used )

……………………………………………………………

5. Although she worked hard all month, she got a low salary.               ( Despite )

…………………………………………………………………………………

6. I don’t want to buy a new computer although I have enough money.  (having)

……………………………………………………………………………………

 giúp mk nha !!!

X. Finish the second sentence so that it has a similar meaning to the first one, beginning each new one with the given word(s). Write the new sentences on your answer sheet.

1. It is about 50km from my house to my daughter’s house.

The distance between …………………………………………………

2. My mother lived in a small town when she was a child.

My mother used to ……………………………………………………

3. Did you often go to the beach when you lived in Nha Trang?

 Did you use ……………………………………………………………

4. She studied hard , but she didn’t pass the exam.

Although………………………………………………………………

5. Although he is old , he plays sports well.

Despite……………………………………………………………

GIÚP MK NHA !!! 

IX. Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the questions.

The volumn of traffic in many cities in the world today continues to expand. This  caused many problems, including serious air pollution, lengthy delays, and the greater risk of accidents. Clearly something must be done, but it is often difficult to persuade people to change their habits and leave their cars at home.

One possible approach is to make it more expensive for people to use their cars by increasing charges for parking and bringing in tougher fines for anyone who breaks the law. In addition, drivers could be required to pay for using particular routes at different times of the day. This system, known as “road pricing”, has already been introduced in a number of cities, using a special electronic card fixed to the windscreen of the car
Of course, the most important thing is to provide good public transport. However, to get people to give up the comfort of their cars, public transport must be felt to be reliable, convenient and comfortable, with fares kept at an acceptable level.

1.   The word expand in paragraph 1 is closet meaning to_____

A.    decrease                                 B. increase                 C. reduce                   D.develop

2. Which of the following is NOT mentioned as a problem caused by more traffic?

A.a serious air pollution                B. greater risks of accidents

 C. people’s habits                           D. very long delays

3. The most important thing to encourage people to use public transport is______

A.high parking fees              B. good public transport

C. road using fees                 D. high charges for public transport

4. The verb “give up” is closet meaning to __________

A. continue using                             B. encourage

C. get bored with                              D. stop using

5. We can learn from the text that___________

A. it is easy for people change their habits.

B. many people will not drive expensive cares

C. more people will use public transport if it is cheap, reliable and comfortable

D. air pollution and lengthy delays cause people to leave their cars at home

GIÚP MK NHA !!!

VIII.  Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks.

Staying safe on foot and bike

Look out for yourself and your friends when out (1)________ foot and bike. Choose the (2) ________ routes you can like quieter, slower roads, with pavements if you’re walking or (3) ________ if you’re going by bike.

It’s easy to get distracted by your phone or by friends, but you need to be (4)________ to traffic. Put your phone away and take your earphones (5)________ when crossing the road. Don’t trust that drivers (6)_______ spot you and be able to stop in time – many drivers go too fast and don’t (7) ________ enough attention, (8)________ anything you can do to protect yourself is a good thing.

1. a. on                                   b. in                            c. by                            d. with

2. a. safe                                 b. safer                       c. safest                      d. safely

3. a. zebra crossings             b. cycle paths            c. footpaths               d. bumpy roads

4. a. risky                               b. warning                  c. serious                   d. alert

5. a. off                                   b. over                        c. out                          d. down

6. a. must                               b. will                         c. could                      d. should

7. a. pay                                 b. make                      c. turn                         d. take

8. a. but                                  b. so                            c. though                    d. because

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks.

            Two of the most important holidays in the United States arer Independence Day and Thanksgiving Day. The fourth of July marks the American declaration of Independence from Britain. Most towns, big or smallm celabrate the fourth of July with parades and fireworks. Families (1)____with barbecues or picnics. Thanksgiving Day is celebrated in fall, on the fourth Thursday in November. It is a day (2)_________people give thanks to the harvest. Most families (3)_________a larger dinner with roast turkey. (4)____________Independence Day and Thanksgiving Day are national (5)_______.

1.   A. celebrating                   B. celebration           C. celebrate               D. celabrated

2.   A. where                            B. when                      C. which                     D. in which

3.   A. have                              B. buy                         C. help                        D. take

4.   A. Besides                         B. Both                       C. Either                     C. Nor

5.   A. chances                        B. month                    C. holidays                D. times

GIÚP MK NHA !!!

VII. Mark the letter A, B, C or D on your answer sheet to indicate the word(s) OPPOSITE in meaning to the underlined word(s) in each of the following question.

1.  The Smiths live in an uncomfortable apartment in the center of the city.

A.  dirty                      B.  cozy                                  C.  warm                                 D.  clean

When you come inside a temple, you should take off your shoes and hat.

A. go on                     B. put on                                C. get on                                 D. turn on

2. Fruit and vegetables grew in abundance on the island. The islanders even exported the surplus.

A.  large  quantity                 B.  small  quantity      C.   excess                D. sufficiency

3. The price of computers reduces, so many people want to buy a new one.

A.      recycle                B. drop                       C. refillable               D. increase

4. I like comedy programmes. They make me laugh.

A. smile                      B. fun                         C.sad                          D. cry

5. She would like her beef steak rare.

A. over-boiled          B. precious                C. scarce                    D. scared

6. If you don’t turn off the light before leaving the room, you will waste electricity.

A.    save                                  B. safe                        C. have                                   D. preserve

GIÚP MK NHA !!!