Question

in ∆ABC masura unghiurilor este d.p cu 3,7,8. Determinati masura ungiurilor

Answer 1

m(A)=a
m(B)=b
m(C)=c

{a,b,c}dp{3,7,8}→
a/3=b/7=c/8=k
a=3k
b=7k
c=8k
a+b+c=180°
(a+b+c)/(3+7+8)=k
180°/18=k
k=10°
m(A)=a=3k=3•10°=30°
m(B)=b=7k=7•10°=70°
m(C)=c=8k=8•10°=80°