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с рисунком и дано !!!!
сторона правильного треугольника,описанного около окружности,равна 12√3см найдите сторону правильного шестиугольника вписанного в данную окружность
Ответы 1
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Ну там очень легко по. Формуле r , поставляешь и получается ответ6
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Автор:
swiss missvfuk - 5 лет назад
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I. "Present Tenses"
1. - What are you looking for? - I ..... my umbrella somewhere, and now I don’t know where it is.
leave
has left
have been leaving
have left
2. It's raining, and I see you don't have an umbrella. You can borrow mine, I ..... it now.
don’t need
did not need
haven’t needed
haven’t been needing
3. Today the world ..... so rapidly; things never stay the same.
changes
has changed
is changing
has been changing
4. Look here! I simply refuse to believe what you ..... me now.
are telling
have been telling
have told
tell
5. Anne is a fashion designer; she ..... to the opening of every new fashion show in the city.
goes
is going
has gone
has been going
6. Linda’s apartment looks nice and tidy because she ..... it every two years.
redecorates
is redecorating
has redecorated
has been redecorating
7. Nora, you look awfully tired. What ..... all day?
do you do
are you doing
have you been doing
have you done
8. Their car is as good as new though they ..... it for a number of years.
have
have been having
are having
have had
9. I have read this chapter in my chemistry text three times, and still I ..... it.
haven’t understood
don’t understand
understand
have understood
10. Zeta has sent me two letters; neither of which ..... .
has arrived
have arrived
arrive
is arriving
11. I don’t like Alice. She ..... about difficulties of life all the time.
complains
is complaining
has complained
has been complaining
12. The Alisons have got three cars, two of which they never ..... .
are using
use
have used
have not use been using
13. Paul looks young for his age. He says he is 56 years old, but nobody ..... him.
hasn’t believed
is not believing
believes
believe
14. Sonia ..... as a computer programmer this year, but she’d like to try something different in the future.
works
has worked
is working
has been working
15. Carol and I are old friends. I ..... her since we studied in high school together.
know
have known
are knowing
have been knowing-
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