Контрольная 6 класс
I. Put the verbs in brackets in the correct form – Present Simple or Present Continuous
1.My wife normally (work) at home, but she (spend) this month in Italy.2. Most days, Tom usually (cycle) to work. 3.When the lesson (start) today?4. What’s your brother doing? He (do) the crossword in the newspaper He (do) it every day. 5.I’m afraid I’ll lose this game of chess. I (play) very badly.6. I usually ___much better (play). 7.What’s she doing? — She (mend) her husband’s socks. She always___ them. (mend)8. Yes, you can borrow my dictionary. I (use) it a lot, but I (not / use) it now
II. Put in the if necessary
1. __ Atlantic Ocean is cold, isn’t it?
2.__Australia is a continent.
3.We live in __ Oxford Street in __ London
4.___ Greens invited us to the party!
5.How can I get to __ Kremlin?
6. Susan is ___ youngest student in or group.
7.__ Sun is a star
8. ___ first house in a street is very beautiful.
9. __ Volga is a river.
10. ___ Netherlands isn’t a very big country.
III. Выбери правильный ответ
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