Răspuns:
Explicație:
a) Notam unghiurile AOB=a, BOC=b, COD=c, DOE=d, EOF=e, FOA=f
a+b+c+d+e+f=360°
a/8 = b/5 = c/2 = d/3 = k
a=8k
b=5k
c=2k
d=3k
10d=3e=15f=k'
d=k'/10=3k => k'=30k
e=k'/3=30k/3=10k
f=k'/15=30k/15=2k
8k+5k+2k+3k+10k+2k=360°
30k=360° ⇒ k=12
a=96°
b=60°
c=24°
d=36°
e=120°
f=24°
b)AOB/2=48°
EOF/2=60°
Măsura = 108°