Respostas

  • Usuário do Brainly
2014-08-26T15:52:43-03:00
Olá kirmão !

ê = 360/ n
î = 180.(n-2)/n

ê/î = 1/5
1/5 = 360/180(n-2)
180(n-2)=5.360
180n-360 = 5.360
180n = 6.360
n=12

P=12.6
P=72
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