∴∠ECD=∠GEC,∠BAE=∠AEG

∠BAF=∠AFP，∠FCD=∠PFC

∠∠EAF = 1/3∠EAB，∠ECF= 1/3∠ECD

∴2∠EAF=∠FAB,2∠ECF=∠FCD

∴∠aec=∠aeg+∠gec=∠bae+∠ecd=3(∠fae+∠fce)

∠∠AFC =∠AFP+∠CFP =∠BAF+∠DCF = 2(∠EAF+∠ECF)

∴∠AFC=2/3×3(∠FAE+∠FCE)=2/3∠AEC

/youxianai/album/item/037 a9d 60d 0870 b 25 EAF 8 f 8 12 . html #