Jawabanmu

2014-05-07T06:06:52+07:00
N =  \frac{360^{0} }{ \alpha } - 1
11 =  \frac{360^{0} }{ \alpha } - 1
11 + 1 =  \frac{360^{0} }{ \alpha } 12 = [tex] \frac{360^{0} }{ \alpha } 12α = [tex] 360^{0}
α =  \frac{ 360^{0} }{12}
α = 30

jawaban = A
7 3 7