Question

Unghiurile A, B, C ale unui triunghi au masurile invers proportionale cu 1/5, 1/6 si 1/7. Afla masurile unghiurilor.

Answer 1

{a, b, c} i.p {1/5; 1/6; 1/7}
=>a/5=b/6=c/7
=>a=5b/6
c=7b/6
5b/6+b+7b/6=180°
18b=1080°|:18
b=60°
=>a=50°; c =70°