Respostas

2013-10-30T23:26:40-02:00
P = 16
g+g+3+3 = 16
2g + 6 = 16
2g = 16-6
2g = 10
g = 10/2
g = 5
Al = pi.r.g
Al = pi.3.5
Al = 15pi cm²
Al ~ 47,1 cm²