[tex]a + b + c = 180 \\ \\ \frac{a}{2} = \frac{b}{5} = \frac{c}{11} = k \: \\ \\ a = 2k \: \: \: \: b = 5k \: \: \: \: c = 11k = \\ \\ 2k + 5k + 11k = 180 = \\ \\ 18k \: = 180 \: \: \: \: \: \: k = 180 \div 18 \\ \\ k = 10 = > a = 10 \times 2 = 20 \\ \\ b = 10 \times 5 = 50 \\ \\ c = 10 \times 11 = 110[/tex]
# Gogoașa Ucigașă 〠
