Respostas

  • Usuário do Brainly
2014-08-31T12:51:48-03:00
Ae= \frac{360}{n}

12= \frac{360}{n}

12n=360

n= \frac{360}{12}

n=30 lados

b)
Ai= \frac{180(n-2)}{n}

Ai= \frac{180(30-2)}{30}

Ai= \frac{180(28)}{30}

Ai=6.28

Ai=168°
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