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phuongmuc
2 năm trước
cho tam giaác ABC có góc A =90 độ,đường cao AK, AB=12cm,BC=20cm a) chứng minh tam giác ABK đồng dạng với tam giác CBA b)chứng minh AK^2=KB.KC.tính AC c)BM là tia phân giác của góc ABC (M thuộc AC)TÍNH MA VÀ MC d) từ M kẻ MI vuông góc BC .CHỨNG MINH IK/KC=AB/BC e) tứ giác AMIK là hình gì?vì sao?tính diện tích tứ giác AMIK chỉ mik câu e với mai mik thi r
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1 tháng 9 2019 lúc 11:49 Giúp mình với ạ . Mình cảm ơn trước nha 🙆 Read the text carefully, then do the tasks: The Britist spend their free time in different ways.People generally use it to relax , but many people also do voluntary work,espeacially for charities A lot of free time is spent in the home, where the most popular leisure activity is wathching telvision, the average viewing time being 25 hours per week.Reading is also a favourite way of spending leisure time.The British spend a lot of time reading newspaper and magazines.In the summer gardening is popular, and in winter it is often replaced by 'do -it-yourself', when people spend time improving or reparing their homes Some 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 friens for a dink in a pub, or have dinner in a restuarant The extra time available at weekends means that some leisure activities, many of them to do with sport,normally take place only then. Traditional spectator sports include football, cricket, horse racing, motor racing and motorcycle racing. Popular forms of exercise are swimming tennis, ice skating, cycling, climbing, and hill or country walking. Familes 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 espeacally go to clubs and discos , while people of all ages go to the theatre, the cinema, art exhibitions and concert A.Decide wheter the following sentences (T) or (F) 1.Many British people use their free time to help people in need 2.In the summer, the British prefer indoor activities 3.All free time activities are individual activities 4.Most British people watch or do sports at the weekend 5.Sometimes people go with their friends to a pub or restuarant 6.British young people don't like going to the movie

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