Предмет: Математика, автор: umemura59

В равнобедренном треугольнике периметр равен 36 см. , найдите две стороны треугольника, если третья сторона равна 14 см.

Ответы

Автор ответа: LiliaV2014
8
 36 - 14 = 22 (см) - две неизвестные стороны.
 22 : 2 = 11 (см) - каждая сторона.
Автор ответа: julyap
2
пусть х - неизвестная сторона треугольника 2 x+14=36\\2x=36-14\\2x=22\\x=11
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Упражнение 1. Сопоставьте время глагола и временное выражение (некоторые используются дважды):
Look! ever, always, never, seldom, often, now, nowadays, usually, at the moment, yet, already, just, recently, lately, every day, on Mondays, tonight, today, always, never, regularly, sometimes, once a year, once a week, Listen! How long…? for, since, these days, still, etc

(Present Simple
Present Continuous
Present Perfect
Present Perfect Continuous)












Упражнение 2. Раскройте скобки, чтобы получить Present Simple, Present Continuous, Present Perfect Continuous или Present Perfect.
1. Is Andy here? – I don’t know, I … (not see) him today.
2. Where … you … (go)? – To the library.
3. Would you like … (borrow) this magazine? – No, thanks. I … (read) it before.
4. Betty’s bus … (arrive) at 5 o’clock. I must go and meet her at the bus station. Have you seen my record book? I … (look) for it all the morning.
5. Mike … (talk) to his friend for an hour already.
6. More and more forests … (disappear) because of fires nowadays.
7. How long … you … (work) on this problem?
8. The first lesson … (not finish) at 9.45.
9. They … (play) football tonight.
10. Linda is disappointed. She … (fail) her test.
11. School … (prepare) children for life.
12. We … (have) a party next Saturday night. Will you come?
13. … you … (try) to take photos? It’s not allowed, you know.
14. … you … (remember) where he … (work)?

Упражнение 3. Переведите на английский язык, придумайте свой пример по образцу
1. Я учу английские слова каждый день.
2. Я учу английские слова уже час.
3. Я учу английские слова. Не мешай мне.
4. Я выучил слова. Проверь меня.


Упражнение 1. Сопоставьте время глагола и временное выражение (некоторые используются дважды):
Look! ever, always, never, seldom, often, now, nowadays, usually, at the moment, yet, already, just, recently, lately, every day, on Mondays, tonight, today, always, never, regularly, sometimes, once a year, once a week, Listen! How long…? for, since, these days, still, etc
Present Simple
Present Continuous
Present Perfect
Present Perfect Continuous











Упражнение 2. Раскройте скобки, чтобы получить Present Simple, Present Continuous, Present Perfect Continuous или Present Perfect.
15. Is Andy here? – I don’t know, I … (not see) him today.
16. Where … you … (go)? – To the library.
17. Would you like … (borrow) this magazine? – No, thanks. I … (read) it before.
18. Betty’s bus … (arrive) at 5 o’clock. I must go and meet her at the bus station. Have you seen my record book? I … (look) for it all the morning.
19. Mike … (talk) to his friend for an hour already.
20. More and more forests … (disappear) because of fires nowadays.
21. How long … you … (work) on this problem?
22. The first lesson … (not finish) at 9.45.
23. They … (play) football tonight.
24. Linda is disappointed. She … (fail) her test.
25. School … (prepare) children for life.
26. We … (have) a party next Saturday night. Will you come?
27. … you … (try) to take photos? It’s not allowed, you know.
28. … you … (remember) where he … (work)?

Упражнение 3. Переведите на английский язык, придумайте свой пример по образцу
5. Я учу английские слова каждый день.
6. Я учу английские слова уже час.
7. Я учу английские слова. Не мешай мне.
8. Я выучил слова. Проверь меня.