2 ** Write sentences.
village (2) There are two villages.
1 house (5)
2 family (3)
3 child (6)
4 person (8)
5 city (2)
6 woman (4)
7 baby (7)​

1) there are five houses.

2) there are three families.

3) there are six children.

4) there are eight persons.

5) there are two cities.

6) there are four women.

7) there are seven babies.

карское - от 0 до 6 градусов

чукотское - от -0,5 до 4 градусов летом

4

данн abcd- треугольник, ab=2, bc=3, угол bac = 3* угла bcaзададим угол bac=x, значит угол bac=3x   теорема синусов 3/sin(3x)=2/sin(x)=2r=>     2sin(3x)=3sin(x)=>     2*(3sin(x)-4*sin^3(x))=3sin(x)=>       6-8sin^2(x)=3=>       8sin^2(x)=3

=>       sin^2(x)=3/8=>       sin(x)=sqrt(3/8)получили 2/sin(x)=2r => r=2/2sin(x)=1/sin(x) =1 : sqrt(3)/sqrt(8) =sqrt(8)/sqrt(3)=2*sqrt(2)/sqrt(3)r=2*sqrt(2)/sqrt(3)