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A=2(π r)(r +h) h=altura
r=radio
A=2π(4)(4+9)
A=2π(4)(13)
A=104π cm² = 326.72cm³
DIAMETRO
2(r)
d=2(4)
d=8
PERIMETRO
formula
p=2πr
p=2(π)(4)
p=25.13