Răspuns :
fie a, b, c, masurile unghiurilor
a/4=b/5=c/6=(a+b+c)/(4+5+6)=180°/15=12°
a=3*12°=48°
b=5*12°=60°
c=6*12°=72°
as simple as that!!!
{ a,b,c } d.p { 4,5,6 }
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a + b + c = 180 ( masura unghiurilor unui triunghi este egala cu 180° )
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a / 4 = b / 5 = c / 6 = K
a / 4 = K => a = 4 K
b / 5 = K => b = 5 K
c / 6 = K =>c = 6 K
4 K + 5 K + 6 K = 180
9 K + 6 K = 180
15 K = 180
K = 180 : 15
K = 12
a = 12 x 4 = 48°
b = 12 x 5 = 60°
c = 12 x 6 = 72°