Răspuns :
a=2b
a=c/3=>c=3a=6b
a+b+c=180
2b+b+6b=180
9b=180 =>b=20
a=40
c=120
a=c/3=>c=3a=6b
a+b+c=180
2b+b+6b=180
9b=180 =>b=20
a=40
c=120
A+B+C=360°
A=2*B
C=3*B
2B+B+3B=360°
6B=360
B=360:6
B=60°
A=2*60
A=120°
C=3*60
C=180°