Lớp 7
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cho tam giác ABC có AB > AC .Điểm M l&agrav...
cho tam giác ABC có AB > AC .Điểm M là trung điểm của BC .chứng minh rằng AB-AC trên 2
Hỏi lúc: 31-03-2021 20:26
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giúp e bài 9,10,11 vs ạ. mai e thi r ạ
giúp e bài 9,10,11 vs ạ. mai e thi r ạ
Hỏi lúc: 28-03-2021 21:31
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I. Choose the word which best fits each gap. Staying safe on...
I. Choose the word which best fits each gap.
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 thatdrivers (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. with2. a. safe b. safer c. safest d. safely3. a. zebra crossings b. cycle paths c. footpaths d. bumpy roads4. a. risky b. warning c. serious d. alert5. a. off b. over c. out d. down6. a. must b. will c. could d. should7. a. pay b. make c. turn d. take8. a. but b. so c. though d. because
Hỏi lúc: 27-03-2021 19:33
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Cho tam giác ABC vuông tại A, lấy điểm N thuộc...
Cho tam giác ABC vuông tại A, lấy điểm N thuộc cạnh BC sao cho BN = BA. Vẽ BD vuông góc với AN (D thuộc AN).
1) Chứng minh BD là phân giác góc ABC
2) Lấy điểm M thuộc cạnh CB sao cho CM = CA. Kẻ CE là tia phân giác của góc ACN (E thuộc AN). Chứng minh ME vuông góc với AN
3) Cho CE cắt BD tại O, cắt AM tại F, BD cắt AM tại I. Chứng minh rằng IE = AO
Hỏi lúc: 27-03-2021 18:13
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480 views
Thầy cô giải giúp em bài này với...
Thầy cô giải giúp em bài này với ạ. Em cảm ơn ạ
Hỏi lúc: 25-03-2021 13:27
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xy+3x-y=62
Hỏi lúc: 20-03-2021 16:11
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xy+3x-y=62
Hỏi lúc: 20-03-2021 16:08
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327 views
thầy giải giúp con bài TÌM G&Oacu...
thầy giải giúp con bài
TÌM GÓC C BIẾT GÓC A - GÓC B = 18* , GÓC B - GÓC C = 18* ( * = độ )
Hỏi lúc: 20-03-2021 11:54
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4143 views
The Bitish spend their free time in different ways....
The Bitish spend their free time in different ways.People generally use it to relax, but many people also do voluntary work, especially for charitiesA lot of free time is spent in the home, where the most popular leisure activity is watching television , the average viewing time being 25 hours per week. Reading is also a favourite way of spending leisure time. The British spend a a lot of time reading newspapers and magazines.In the summer gardening is popular, and winter it is often repplaced by 'do-it-yourself' , when people spend time improving or repairing their homesSome leisure activities are mostly or entirely social.Inviting friends for a drink or a meal at home is the most usual one. Sometimes people join friends for a drink in a pub, or have dinner in a restuarantThe extra time available at weekends means that some leisure activities, many of them to do with sport, normally take place only then. Traditional specator sports include football, cricket, horse racing., motor racing and motorcycle racing.Popular form of exercise are swimming, tennis, ice skating or roller-skating,cyclling, climbing, and hill or country walkingFamilies often have a 'day out' at the weekend,especially in summer, with a visit to a local event such as a festival, fair or show.Young people expecally go to clubs and discus, while people of all ages go to the threatre, the cinema, art exhibitions and concertsA.Decide wheter the following sentences are true(T) or false(F)1.Many British people use their free time to help people in need2.In summer, the British prefer indoor activties3.All free time activities are individual activities4.Most British people watch or do sports at the weekend5.Sometimes people go with their friends to a pub or restuarant6.British young people don't like going to the moviesAnswer the question:1.What's the most popular free time activity in the UK?=>2.How many hours a week do the British watch TV?=>3.In winter, what do the British often do in their spare time?=>4.Which sports do many people enjoy watching?=>Hỏi lúc: 18-03-2021 20:59
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cho tam giác abc trung tuyến am biết bam >cam .h&a...
cho tam giác abc trung tuyến am biết bam >cam .hãy so sánh góc b và góc c
Hỏi lúc: 16-03-2021 21:11
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1. We/ live in a flat when I was a child. __________________...
1. We/ live in a flat when I was a child.
_________________________________________________________________ 2. People/ not have/ mobile phones 20 years ago. _________________________________________________________________ 3. Jim/ go/ swimming every weekend? _________________________________________________________________ 4. My father/ smoke/ but he gave up five years ago. _________________________________________________________________ 5. Lily/ not cook/ much, but now she makes dinner every day. _________________________________________________________________ 6. There/ be/ a supermarket on the corner? _________________________________________________________________ 7. People/ not buy/ so much stuff as they do today. _________________________________________________________________ 8. You/ play football or basketball at school? _________________________________________________________________ 9. I/ go/ to bed very late but not anymore! _________________________________________________________________ 10. Which TV programme/ you/ watch/ most/ when you were little? _________________________________________________________________Hỏi lúc: 15-03-2021 14:31
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cho tam giác abc có a<90 độ vẽ tam giác abd và ace vuôgn cân tại a
a,chứng minh dc=be,dc vuoogn góc với be
b,n la trung điểm của de,tia đối của na có m sao cho na=mn.cmr:ab=me vafta,tamgiacs abc=tam giác ema
c,ma vuông góc với bc
Hỏi lúc: 10-03-2021 20:03
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457 views
Mọi người giải giúp e ạ !! e cảm ơn Cho tam gi&a...
Mọi người giải giúp e ạ !! e cảm ơn Cho tam giác ABC có AB bé hơn AC ; M nằm giữa B và C
a) chứng minh góc B lớn Hơn góc C b) chứng minh AM bé hơn 0,5. (AB+AC+BC c) Chứng minh AM lớn hơn 0,5. (AB+AC-BC LƯU Ý DẤU CHẤM LÀ NHÂN
Hỏi lúc: 09-03-2021 17:31
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667 views
dòng điện chạyqua trong chất khí trong b...
dòng điện chạyqua trong chất khí trong bóng đèn của but thử điện làm chất khí này
Hỏi lúc: 07-03-2021 14:03
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Có vẽ được bao nhiêu hình tam giá...
Có vẽ được bao nhiêu hình tam giác vẽ bởi 3 điểm bất kì trong 9 điểm như sau:
. . .
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Hỏi lúc: 04-03-2021 21:24