Respostas

2014-07-03T13:49:14-03:00
25pi=pi.r^2
r^2= 25
r=5
L=comprimento= pi.r
L=pi.5
2014-07-03T14:05:54-03:00
Círculo:
A=πR²
C=2πR

25π²=πR²
25π=R²
√25π=R
5π=R

C=2π5π
C=10π²

1 5 1