Mong mọi người giúp em, hơi nhiều ạ
Tổng cộng 5 bài ạ, mong mọi người giúp đỡ em
Em gửi hình bên dưới ạ
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a) Xét (O) có
\(\widehat{BAD}\) là góc nội tiếp chắn \(\stackrel\frown{BD}\)
\(\widehat{CAD}\) là góc nội tiếp chắn \(\stackrel\frown{CD}\)
mà \(\widehat{BAD}=\widehat{CAD}\)(AD là tia phân giác của \(\widehat{BAC}\))
nên \(\stackrel\frown{BD}=\stackrel\frown{CD}\)
hay BD=CD
Ta có: OB=OC(=R)
nên O nằm trên đường trung trực của BC(Tính chất đường trung trực của một đoạn thẳng)(1)
Ta có: BD=CD(cmt)
nên D nằm trên đường trung trực của BC(Tính chất đường trung trực của một đoạn thẳng)(2)
Từ (1) và (2) suy ra OD là đường trung trực của BC
hay OD\(\perp\)BC(đpcm)
II/ Use a relative pronoun to combine each pair of the sentences. If the relative pronoun can be omitted, write it in brackets.
1. Professor Wilson who teaches Chemistry is an execellent lecturer
2. The man whom you met at the party last night is a famous actor
3. There are some words which are very difficult to translale
4. The student whose composition I read writes well
5. Jim's sister whom you met yesterday is a famous architect
6. I accepted neither of two job offers which I received
7. I've found the book which I was looking for this morning now
8. Mrs Smith who does volunteer work at the hosptial is a retired teacher
9. I live in a dormitory whose resident come from many countries
10. Lake Prespa which is on the north Greek border is lonely beautiful lake
11. The little girl who sat next to me on the coach ate candy the whole way
12. The police blocked off the road which caused a traffic jam
13. Felix Reeve whose tape recorder was stolen is a journalist
14. This famous picture which was damaged during the war is worth thousands of pound
15. The village has around 200 people whom the majority of are famers
16. I don't know the name of the woman whom I spoke to on the phone
17. We often go to visit our friends in Bristol which is only 30 miles away
18. I have to call the man whose umbrella I accidentally picked up after the meeting
19. Louis knows the woman who is meeting us at the airport tomorrow
20. The scientist, who discovered a new planet, has won the Nobel Prize
21. The river, which flows through Hereford, is the Wye
22.We climbed to the top of the tower where we had a beautiful view from
23. A few days ago I met diana, whom i hadn't seen for ages
24. This is a photograph of our friends who we went on holiday with
25. The value of this famous painitng which was damaged during the war is inestimable
V/Combine the sentences by using relative adverbs
1. That is the place where the accident occured
2. 7:05 is the time when my plane arrives
3. I will show you the secondhand bookshop where you can find valuable old books
4. The house where I was born and grew up was destroyed in an earthquake ten years ago
5. Mark likes to travel at night when the roads are quiet
6. We went to the Riverside Restaurant where I once had lunch with Henry
7. She doesn't want to speak of the cause why she divorced her husband
8. They days when I lived far from home were the saddest ones
9. A cafe is a small restaurant where people can get light meal
10. We have to cut down our daily expenses for the reason which you didn't tell us
VI/ Complete the advertisment. Put in who, whom, whose, which, where or why
(1) which (6) whom
(2) which (7) who
(3) who (8) which
(4) whose (9) where
(5) why
VII/ Use a relative pronoun or relative adverb to combine each pair of sentences
1. The student who sits next to me in the English class is from China
2. The Old Man and the Sea which where written by Ernest Hemingway is an interesting novel
3. The professor who is taking his course is execellent
4. Mr.Smith, whom I had come to see, was too busy to speak to me
5. The man whom I respect most is my father
6. Do you know the reason which makes Marta left?
7. Tom has three sisters, all of whom are married
8. I recently went back to Paris, which is still as beautiful as a pearl
9. I recently went back to Paris, where I was born nearly 50 years ago
10. Laura couldn't find the box in which she kept her photos
11. Art Golding who played the ship's captain in 'Iceberg' was a famous actor
12. The police want to know the hotel that Mr.Bush stayed at two weeks ago
13. I've sent two letters neither of which he has received
14. That man who I don't remember his name is an artist
15. Do you remember the day that we moved to this town?
16. The reason why the president will come to that city hasn't been told yet
17. Vicky didn't get the job which made her very depressed
18. My uncle who you met at the bus stop this morning usually goes to work by bus
19. That car, the engine of which is very good, belongs to Dr.Clark
20. He gave several reasons for his fault ,only a few of which were valid
21. Charlie Chaplin, whose films amused million of people in the word, died in 1977
22. The taxi driver who took me to the airport is friendly
23. I ran intoa woman with whom I has gone to elementary school
24. The house which I used to live is empty now
25. Do you remeber the year when the First War ended?
26. A girl who was injured in the accident is now in hospital
27. Mrs.Bond is going to spend a few weeks in Sweeden where here daughter lives
28. We stayed at the Grand Hotel, which Ann recommended to us
29. My sister was looking after a dog whoose leg had broken in an accident
30. The street is very noisy at night, which makes it difficult to sleep
VIII/ Put in the relative clause. Sometime there is more than one possible answer
1. The person who knows all about it is the secretary
2. Vicky, whose name was missed off the list, wasn't very pleased
3. The picture which was painted by Laura is being shown in an exhibition
4. The concert which we're all looking forward to is next Saturday
5. The week when Mand Harriet went camping was the wettest of the years
6. Aunt Loan, who didn't hear the phone is a bit deaf, didn't hear the phone
7. Henry, whom you will meet, is also a member of the board
8. I'll see you near the post office, where we meet the other day
9. Zedco, who has 10.000 employees, is an international company
10. The reason why I didn't write to you was that I didn't know your address
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