Respostas

2014-04-18T19:22:38-03:00
C=2pi*R                       1,25/2=0,625
C=2*3,14*0,625
C=3,925m

Obs.: considerei pi=3,14
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2014-04-18T19:23:13-03:00
2* \pi *r
2*3,14*0,625m = 3,92m
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