∵ABCD是平行四边形∴∠ABC=∠ADC=70°∠C=∠A=110°∵BE平分∠ABC，那么∠CAE=1/2∠ABC=35°DF∥BE∴∠CFD=∠CBE=35°∴△CBF中：∠1=180°-∠C-∠CFD=180°-110°-35°=35°
