Какие из следующих утверждений верны? 1) все диаметры окружности равны между собой 2)сумма углов любого треугольника равна 360 градусам 3)если в параллелограмме две соседние стороны равны, то такой параллелограмм является ромбом

1) Все диаметры окружности равны между собой – верно. 
Диаметр - отрезок, проходящий через центр окружности и равен двум  радиусам. Все радиусы одной окружности  равны. 
  
2) Сумма углов любого треугольника равна 360 градусам – неверно. Сумма углов любого треугольника 180°

3) Если в параллелограмме две соседние стороны равны, то такой параллелограмм является ромбом. Верно.
 В параллелограмме противоположные стороны равны и параллельны. Если равны и соседние стороны, то все стороны равны. Параллелограмм, все стороны которого равны – ромб. 

1)I haven't eaten the cake yet

2. We used to love to eat meat

3. I was walking when it started to rain

4.he is as handsome as his dad

5.this dress is cheapest

6.we are as funny as our friends

7.she has never been to the forest

8. These nails are sharp as knives

9. I've never been to a recycling center before

10. They never rewrote d / z

11. have you already eaten?

12 Mom was reading a book when I asked for food

13. You just ate.

14. We have enough food.

15. This dress is too expensive to buy.

16. He's too smart not to learn.

17. I didn’t use old things again, but now I do.

18. We built a house

19. I was in New York in 1925

20.I think we will fly to Mars in the future. In the meantime, there is no need to know about it. ”

Объяснение:

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1.I've never eaten such delicious cakes before. 2 You've never been here before, have you? 3. You came to this Mall for the first time, didn't you? 4. Have you ever been late for a plane? 5. I met some interesting people during my time here. 6. George has had three accidents since he bought this car. 7 students have already passed this exam. - When did they give it up? 8. I haven't been to this cafe in a while. Last time I had lunch there was three months ago. 9. Since I got up this morning, I've had 10 cups of coffee. 10. Did you see Anna today? - No, I haven't met her this week. I think she's sick. 11. I'm sorry I haven't called you in so long, but I've been really busy lately. 12. We have just discussed this issue. - What decision did you make? 13. Since we started repairs, we've spent a lot of money, but we haven't finished the job yet. 14. I loved the movie I saw yesterday. I've always liked Comedy. 15. Did you hear the news? Anna married Paul. - How many people were at their wedding? 16. My husband has been on a business trip three times in the last month. Before he had never been away from home so often 17. Since Ella moved to Moscow, she has made a good career. She became a Manager in a major Bank. 18. Ever since my sister started working in a restaurant, it's so much better. 19. When dad returned from work in the evening, he said: "this morning I had an important meeting". 20. How long have you had this computer? - We bought it three years ago, and it's never broken down in all this time.