Respostas

2014-05-07T22:43:29-03:00
S=(n-2)*180°
1440=(n-2)*180
1440 = 180n-360
1440+360 = 180n
1800 = 180n
n = 10


d=n*(n-3)/2
d=10*(10-3)/2
d=10*7/2
d=70/2
d=35 diagonais
16 4 16