Question

ajutor ...............

Answer 1

a=m(A), b=m(B), c=m(C)
a+b+c=180°
a/1=b/3=c/5, a=b/3=c/5, b=3a, c=5a, inlocuim pe b si c in prima ecuatie
a+3a+5a=180
9a=180, a=180/9=20°
b=3a=60°
c=5a=100°