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180(n-2)=1260
n-2=7
n=9
Si n=9:
N° de diagonales :
n(n-3)/2
=>9(9-3)/2
=>respuesta:27
180(n-2)=1260
n-2=7
n=9
Si n=9:
N° de diagonales :
n(n-3)/2
=>9(9-3)/2
=>respuesta:27