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14 tháng 11 2024

a: Xét ΔKBC vuông tại K và ΔHCB vuông tại H có

BC chung

\(\widehat{KBC}=\widehat{HCB}\)

Do đó: ΔKBC=ΔHCB

=>\(\widehat{KCB}=\widehat{HBC}\)

b: ΔKBC=ΔHCB

=>KC=HB

14 tháng 11 2024

a: Xét ΔMAB và ΔCBA có

\(\widehat{MAB}=\widehat{ABC}\)(hai góc so le trong, MA//BC)

AB chung

\(\widehat{ABM}=\widehat{BAC}\)(hai góc so le trong, MB//AC)

Do đó;ΔMAB=ΔCBA

Xét ΔABC và ΔCNA có 

\(\widehat{BAC}=\widehat{NCA}\)(hai góc so le trong, BA//CN)

AC chung

\(\widehat{BCA}=\widehat{NAC}\)(hai góc so le trong, AN//BC)

Do đó: ΔABC=ΔCNA

b: ΔMAB=ΔCBA

=>MA=CB

ΔABC=ΔCNA

=>BC=NA

mà BC=AM

nên AM=AN

mà M,A,N thẳng hàng

nên A là trung điểm của MN

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14 tháng 11 2024

Hình 10: Xét ΔBAC có \(\widehat{CAD}\) là góc ngoài tại đỉnh A

nên \(\widehat{CAD}=\widehat{ABC}+\widehat{ACB}\)

=>\(x=63^0+45^0=108^0\)

Hình 11: Xét ΔABC có \(\widehat{ACD}\) là góc ngoài tại đỉnh C

nên \(\widehat{ACD}=\widehat{CAB}+\widehat{CBA}\)

=>\(x=81^0+50^0=131^0\)

Hình 12: Xét ΔBMC có \(\widehat{AMB}\) là góc ngoài tại đỉnh M

nên \(\widehat{AMB}=\widehat{MBC}+\widehat{MCB}\)

=>\(x=38^0+48^0=86^0\)

Hình 13: Xét ΔMAB có \(\widehat{AMC}\) là góc ngoài tại đỉnh M

nên \(\widehat{AMC}=\widehat{MAB}+\widehat{MBA}\)

=>\(x+60^0=120^0\)

=>\(x=60^0\)

Hình 14: Xét ΔBAC có \(\widehat{CAD}\) là góc ngoài tại đỉnh A

nên \(\widehat{CAD}=\widehat{ABC}+\widehat{ACB}\)

=>\(x+x=90^0\)

=>\(2x=90^0\)

=>\(x=45^0\)

Hình 15:

Xét ΔABC có \(\widehat{CBD}\) là góc ngoài tại đỉnh B

nên \(\widehat{CBD}=\widehat{BAC}+\widehat{BCA}\)

=>\(x+x=44^0\)

=>\(2x=44^0\)

=>\(x=22^0\)

  III. Read the passage and choose the correct answer A, B, C or D to fill each blank in the following passage. During the teenage years, many people can sometimes be (51) ………….. to talk to. They may not like to talk about their work at school. This is a normal development at this age, though it can be very hard for  their (52)…………..to understand. Teenagers are trying to become adults. Parents should do (53) …………..best to talk to their son or daughter about school,...
Đọc tiếp

 

III. Read the passage and choose the correct answer A, B, C or D to fill each blank in the following passage.

During the teenage years, many people can sometimes be (51) ………….. to talk to. They may not like to talk about their work at school. This is a normal development at this age, though it can be very hard for  their (52)…………..to understand. Teenagers are trying to become adults.

Parents should do (53) …………..best to talk to their son or daughter about school, work and future plans but shouldn’t push them to talk if they don’t want to. Parents should watch for (54) …………signs: some young people are trying to be adults may experiment with drug, alcohol, or smoking. These are not good for their health and for their future. Parents should know these signs and help them out.

Television programs can be important for their lives, so. Parents should know what television programs their teenage children are watching. They shouldn’t stop them from watching TV but guide them (55) …………… good programs.

51. A. difficult                B. difficulty                   C. difficulties              D. difficultly

52. A. father                    B. mother                      C. teacher                    D. parents

53. A. my                        B. his                             C. their                        D. her

54. A. danger                   B. dangerous                 C. dangerously           D. to danger

55. A. watch                    B. watches                     C. watching                D. to watch

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14 tháng 11 2024
   
   
   

 

14 tháng 11 2024

s

16 tháng 11 2024

41 be

42 many

43 much

44 hour

45 pollution

16 tháng 11 2024

46 drive

47 should

48 traffic

49 spends

50 should

Happiness is the key to a healthy life. Here are some things you can do to make you happy.  When you love somebody, express your love. Don't keep it to yourself. There are many ways to do it. For example, you can say "I love you" more often do things together, and help them when they need you. You can make yourself and others happy by doing so. Laugh more often Laughter shows that you are happy, and it has the magic power of making others happy too. Laughter is like medicine. It helps people...
Đọc tiếp

Happiness is the key to a healthy life. Here are some things you can do to make you happy.  When you love somebody, express your love. Don't keep it to yourself. There are many ways to do it. For example, you can say "I love you" more often do things together, and help them when they need you. You can make yourself and others happy by doing so. Laugh more often Laughter shows that you are happy, and it has the magic power of making others happy too. Laughter is like medicine. It helps people live longer. Enjoy adventures Visit a new place, do a new thing, or talk to a new person every week You will get new knowledge and experience.

36. The phrase "the key" in the first line is closest in meaning to……………………...

  A. the first factor.       B. the most important factor.      C. the new factor. 

37. To show your love to other people, you………………

  A. give them money.       B. take care of yourself.       C. do things with them. 

38. The writer says "Laughter is like medicine" because ……………………..

  A. it makes others laugh too.   

  B. it helps you make friends.  

  C. it helps people live longer. 

39. You can get knowledge and experience by……………………………

  A. visiting new places.      B. loving other people.        C. laughing more often. 

40. The best title for this passage is “………………………….……..”

  A. Live to be happy. 

  B. Laughter is the power of happiness. 

  C. Happiness is hard to find.

1
16 tháng 11 2024

Happiness is the key to a healthy life. Here are some things you can do to make you happy.  When you love somebody, express your love. Don't keep it to yourself. There are many ways to do it. For example, you can say "I love you" more often do things together, and help them when they need you. You can make yourself and others happy by doing so. Laugh more often Laughter shows that you are happy, and it has the magic power of making others happy too. Laughter is like medicine. It helps people live longer. Enjoy adventures Visit a new place, do a new thing, or talk to a new person every week You will get new knowledge and experience.

36. The phrase "the key" in the first line is closest in meaning to……………………...

  A. the first factor.       B. the most important factor.      C. the new factor. 

37. To show your love to other people, you………………

  A. give them money.       B. take care of yourself.       C. do things with them. 

38. The writer says "Laughter is like medicine" because ……………………..

  A. it makes others laugh too.   

  B. it helps you make friends.  

  C. it helps people live longer. 

39. You can get knowledge and experience by……………………………

  A. visiting new places.      B. loving other people.        C. laughing more often. 

40. The best title for this passage is “………………………….……..”

  A. Live to be happy. 

  B. Laughter is the power of happiness. 

  C. Happiness is hard to find.

16 tháng 11 2024

Đề thiếu e bổ sung thêm nhé

III. Give the correct forms of the words given in brackets. 26. It is ……………… to eat too much sugar and fat.                                   (HEALTH) 27. We were ……………with the service at the cinema. Everything was terrible.(SATISFY) 28. We will use souces of energy more…………... for our future.                (EFFECTIVE) 29. It is ……………….for you to drink that water.   ...
Đọc tiếp

III. Give the correct forms of the words given in brackets.

26. It is ……………… to eat too much sugar and fat.                                   (HEALTH)

27. We were ……………with the service at the cinema. Everything was terrible.(SATISFY)

28. We will use souces of energy more…………... for our future.                (EFFECTIVE)

29. It is ……………….for you to drink that water.                                          (DANGER)

30. He plays music very well. He is a famous …………….                        (MUSIC)

31. John drives ……………... He sometimes makes accident.                                (CARE)

32. How much is the…………… ticket from London to Paris?                                     (FLY)

33. We haven’t talked to each other recently because of …………….... (UNDERSTAND)

34. I prefer mountain …………….….to hiking.                                       (CLIMB)

35. Village festival is ………………….festival in Viet Nam.                  (TRADITION)

 

2
16 tháng 11 2024

26 unhealthy

27 dissastisfied

28 effectively

29 dangerous

30 musician

16 tháng 11 2024

31 carelessly

32 flight

33 misunderstanding

34 climbing

35 traditional

15 tháng 11 2024

Đây là bài thơ rất hay và ý nghĩa, giãy bày rất nhiều cung bậc cảm xúc của  người viết với ông đồ, cũng như sự tiếc nuối xót xa khi người ta đnag giần quên đi những nét văn hóa xưa, tập tục đẹp của dân tộc Việt Nam.