Задание 1:
Paul acted as if he owns/owned the company.
I wish i went/had gone to the concert kast hight.
Its night time you learnt/had learnt how to cook.
Suppose you saw/had seen someone getting mugged, what would you do?
Its about time we replaced/had replaced the old printer.
I'd rather you hadn't told/didn’t tell everyone my secret at the party last night.
| would have prepared some sandwiches if | knew/had known you were visiting.
I'd rather you didn’t turn on/hadn’t turned on the TV when |'m reading.
If only | didn’t break/hadn’t broken my dad's camera. He's very angry with me.
Задание 2:
| wish | (ask) my parents’ advice before | decided to buy the house.
Alan says he would rather (prepare) the dinner by himself.
|'d rather you (send) me a letter than an email.
Supposing | needed to borrow some money, (you/lend) some to me?
She isn't a trained ballerina but she dances as if she (be).
If you hadn't left early, you (hear) Tom playing the quitar.
| wish Alan (not/change) jobs; it's not the same here without him.
Задание 3:
Your brother has started plat thie dolin. Ya want him to stop practisira late at night. What do you say?
I'd rather you
You friend has the flu, You think she should go to the doctor. What do you say?
Youd better
Your parents have atfered't to Buy you an MP3 player for our birthday rather than the computer you had asked for. What do you say?
I'd rather you
Your friend has asked if you" d ike to go to 6 the beach You! want to Say at Phot, What do you say?
| would prefer
Your friend eats a lot of juice food. You think she shoule eat less. What do you say?
You had better
Your parents ask if you enjoyed your visit to the museum. you regret having gone, What do you say?
I'd rather
1. We need to decide how to celebrate your birthday,
2 You needn't to go to the shop. I have bought everything we need.
3. Pupils must wear uniforms at school. It's a rule!
4. They don't have to cook dinner. Mother has done it.
5. People mustn't cross the street when traffic lights are red!
6. You have to do morning exercises! It's very useful!
7. May I take your pen? I have lost my pen
8. My friend can't speak English, but he speaks French.
9. You shouldn't go out if you feel not very well.
10. I should to take my umbrella, it's raining
Объяснение:
the side surface of this pyramid consists of 6 isosceles triangles with a base 16 and a side 17.
Find the area of one triangle.
S = 1/2bh, where b is the base and h is the height.
The height is found by the Pythagorean theorem.
The height is equal to the square root of the difference between the squares of the side of the triangle and the half of the base. Half of the base 16 / 2 = 8
17*17 - 8*8 = 225. The square root of 225 is 15. The height of the triangle is 15. Then the area of the triangle will be equal to S = 1/2*16*15 = 120 and the area of the side surface of this pyramid is equal to the area of one triangle multiplied by 6. S1 = 120 * 6 = 720