Respostas

2014-04-19T15:16:44-03:00
C = 2πR = 2 x 3,14 x r = 6,28r
50,24/6,28 = R
R = 8
2014-04-19T15:19:54-03:00
C=2pi*R
50,24=2*3,14*R
50,24=6,28R
50,24=R
6,28
R= 8
Obs.: Considerei pi= 3,14