9)∠AOB=∠BOC; ∠COD=∠DOE;
∠AOE=∠AOB+∠BOC+∠COD+∠DOE=96°=2(∠BOC+∠COD); ⇒
1)∠BOD=∠BOC+∠COD=2(∠BOC+∠COD)/2=96°/2=48°
2)∠BOD=∠BOC+∠COD=42°;
∠AOE=2(∠BOC+∠COD)=2*42°=84°
10) ∠ABD=105°;
∠ABC:∠CBD=3:4;
∠ABC=3*∠ABD/(3+4)=45°;
∠CBD=∠ABD-∠ABC=105°-45=60°;
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9)∠AOB=∠BOC; ∠COD=∠DOE;
∠AOE=∠AOB+∠BOC+∠COD+∠DOE=96°=2(∠BOC+∠COD); ⇒
1)∠BOD=∠BOC+∠COD=2(∠BOC+∠COD)/2=96°/2=48°
2)∠BOD=∠BOC+∠COD=42°;
∠AOE=2(∠BOC+∠COD)=2*42°=84°
10) ∠ABD=105°;
∠ABC:∠CBD=3:4;
∠ABC=3*∠ABD/(3+4)=45°;
∠CBD=∠ABD-∠ABC=105°-45=60°;