Test for the 4th quarter
1. Choose the correct answer A, B, C or D.
1. Sandy is now on holiday. She’s gone to ___Turkey.
A) a B) C) an D) the
2. Our visit to___ USA was really unforgettable.
A) a B) C) an D) the
3. Lake Como is situated high in the mountains in Italy.
A) The, the B) A, a C) , D) , the
4. The largest river in the USA is ___ Mississippi River.
A) B) an C) a D) the
2. Complete the sentences with who, which, that or where.
1. Rosalyn is the girl I met yesterday night.
2. Boys can’t drive, should learn soon.
3. Do you know the teacher is teaching now.
4. The books I borrowed were amazing.
5. The money my mom gave me was little.
3. Complete the sentences with just, already, never, yet or nothing (---).
1. I haven’t decided where to go in the summer.
2. Our school has moved to a new brand building.
3. “Has he sung in a choir?” “No,. But he has acted in a theater play.”
4. I have been to New York, but I have visited Washington D. C.
5. We haven’t managed to sell our house .
6. My sister got married last month.
4. Rewrite the following sentences using the words in the brackets.
1. Damir used to like this flat. (didn’t)
2. Ahmed didn’t use to notice his mistakes. (used)
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