Предмет: Геометрия, автор: Влюбленна

садовый участок имеет форму треугольника со сторонами 60, 80 и 100м. Определите площадь участка

Ответы

Автор ответа: Caroline03
0

по формуле Герона

1)найдем полупериметр P=a+b+c/2=60+80+100/2=120

2)S=КОРЕНЬ КВАДРАТНЫЙ P*(P-a)*(P-b)*(P-c)=КОРЕНЬ ИЗ 120*(120-60)*(120-80)*(120-100)=КОРЕНЬ ИЗ120*60*40*20=КОРЕНЬИЗ5760000=2400М^2

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Make the questions.

Example: I am hungry. - Are you hungry?

1. They can dance. __________________________________________________________?

2. I like reading books.________________________________________________________?

3. We live in a big city.________________________________________________________?

4. I can play the guitar.________________________________________________________?

5. They are cool.______________________________________________________________?

6. We are pen friends.__________________________________________________________?

7. The parrot eats apples.________________________________________________________?

8. They are Austrian.___________________________________________________________?

9. Brad listens to the radio._______________________________________________________?

10. Elephants eat grass.__________________________________________________________?

11. I am good at school._________________________________________________________?

12. They go to school by bus._____________________________________________________?

13. Henry does his homework.____________________________________________________?

14. Simon reads comics._________________________________________________________?

15. Sally smokes.______________________________________________________________?

Put the verbs into the correct form

1. Samantha ______________________________ (to go) to the running track

2. My sister ______________________________ (to play) basketball in her school with her sport teacher.

3. They ______________________________ (to be) installing their cd-rom

4. We ______________________________ (to have) breakfast .

5. He ______________________________ (to study) in a university .

6. Does she have a problem ? no , she ______________________________ (do) not

7. Salima and Sara ______________________________ (to eat) their lunch .

8. The baker and the lawyer ______________________________ (to be) workers .

9. She ______________________________ (to be) 12 years old .

10. Her uncle ______________________________ (to put) the screwdriver and the hammer away.