Respostas

  • Usuário do Brainly
2014-08-04T20:24:42-03:00
I = 180(n-2)/n 
e = 360/n

180(n-2)/n = 9.360/n
180n-360 = 9.360
180n=10.360
n=360/18
n=20
icoságono regular
6 4 6