Question

Помогите со 2ч. даю 35 баллов

Answer 1

1. d=25

С=2ПR

R=1/2d=1/2×25=12.5

С=2×3.14×12.5=78.5

2. S=ПR²

R=6.2

S=3.14×6.2=19.468=19,4

3. С=2ПR=58.09

58.09=2×3.14×R

58.09=6.28R

R=9.25

d=2R

d=2*9.25=18.5

4. C=2ПR=72.22

72.22=2×3.14×R

72.22=6.28R

R=11.5