∵FG ∥ EC，∴∠GAC=∠ACE=36°，∴∠PAC=∠PAG+∠GAC=36°+12°=48°．又∵AP平分∠BAC，∴∠BAP=∠PAC=48°，∴∠BAG=∠BAP+∠PAG=48°+12°=60°．∵DB ∥ FG，∴∠ABD=∠BAG=60°．
