Предмет: Математика, автор: ellanuta

Познач формулу квадратного паралелепіпеда.
Допоможіть, в мене зараз тема така, я її погано розумію. Дам десять балів.

Ответы

Автор ответа: Anton29310
0

Ответ:

Площа повної поверхні:

S\pi = 6a², де a — сторона.

Об'єм:

V = a³.

Діагональ:

d = a√3

Пошаговое объяснение:

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Прочитайте текст и выберите к вопросам 1-5 правильные варианты ответов.

The best picture
When Sebastian was a boy at school, his favourite lesson was art, and he won several prizes for it. Once he left school, he got a position as a clerk in a bank, but three times a week he went to evening classes in art, and whenever he had time at the weekends, he painted.
He painted in a very modern manner – mysterious objects and shapes, women with three pink eyes, large blank areas, and so on.
After a few months he thought, “Perhaps I call sell some of my pictures and get enough money to afford to leave the bank and became a real artist. Then I can travel around as much as I like, and go to foreign museums, and see other artists ‘paintings, and study in other countries when I feel like it. Though I try to make the best of the job and I don’t regard the work as difficult – at least not at present – I don’t like life in a bank. I only enjoy painting”.
In the bank, Sebastian sometimes had to deal with a man who owned a picture shop, and after he had had a few conversations with him, Sebastian invited him to his home one evening to see some of his works. “Then perhaps you could tell me whether I can really be a good artist and get some money from my painting,” Sebastian said hopefully.
The man said he was prepared to come and see what he thought of Sebastian’ work, so he arrived one evening at Sebastian’s home. Sebastian took the man to his studio and started to show him some of his pictures, with some pride and hope.
The man looked at them one after the other while Sebastian watched his face, but to Sebastian’s disappointment the man did not say anything, and his expression did not change at any of them either.
Then, when he had finished, he looked around, and his glance fell on something else. A happy look came over his face for the first time, and he said, “Now I like this one very much! It’s so full of deep feeling! I’m sure I could sell this one for you.
“That,”said Sebastian, “is the place where I clean the paint off my brushes”.

1. After leaving school Sebastian
a) won several prizes.
b) went to bank three times a week.
c) tried to earn as much money as he could.
d) tried to spend as much time as he could painting.
2. Sebastian’s dream was to
a) live the life he wanted.
b) visit museums.
c) earn a lot of money.
d) work in the bank
3. Sebastian decided to invite the owner of the picture shop because
a) he wanted to own a picture shop too.
b) he wanted to have a conversation with him.
c) he wanted to sell him some pictures.
d) he wanted to see some of his pictures.
4. Sebastian was disappointed because
a) the man was too proud to speak.
b) the man didn’t seem to like the pictures.
c) the man didn’t want to buy his pictures.
d) the man didn’t want to sell his pictures.
5. The thing the man liked most of all was
a) a picture which someone else had sold to Sebastian.
b) the place where he was happy.
c) the place where Sebastian kept his brushes.
d)the place where Sebastian cleaned his brushes.

Task 2
Choose the right option and fill in the gaps.
Выберите правильный вариант и заполните пропуски.

1. If I am not too busy, I … to the concert.
a) go b) will go c) to go
2. If we were in America, we … to see Washington.
a) will go b) go c) would go
3. If they … his address, they would write him a letter.
a) knew b) know c) would know
4. If he …………. hard, he would have achieved great progress.
a) works b) worked c) had worked
5. If I …………. a princess, I would live in a palace.
a) be b) was c) were
6. Weather in England ……………. very quickly.
a) cans change b) can change c) can to change
7. We …………… to finish this work next week.
a) will can b) will be able to c) can
8. They don’t get ……..with each other.
a) along b) down c) off
9. She is still trying to get ……. her cold.
a) away b) together c) over
10. The girl put ……. her black velvet dress.
a) up b) on c) dawn
11. English is an easy language to study, it ……….. by more than 450 million people all over the world.
a) was spoken b) speaks c) is spoken

Task 3. Form the right part of speech.
1. The _______ of America was a great event of the 15th century. DISCOVER
2. Those who hurt other people must take some __________. PUNISH
3. Nobody though that anything could happen to the Titanic. The ship was considered ______________ SINK
4. According to the __________ of human rights, all people are equal. DECLARE
5. This is one of the most popular _________________of last year. ADVERTISE
6. To be ________ means to respect other people’s values. PATIENCE
7. Everybody listened the president very ____________. ATTENTIVE
8. The _________ of the country tried to prevent the war. LEAD
8 лет назад