∵CE、AE分别平分∠ACD、∠CAB,∴∠2= 1 2 ∠BAC,∠1= 1 2 ∠ACD,故∠1+∠2= 1 2 (∠ACD+∠CAB);∵AB∥CD,∵∠ACD+∠CAB=180°,∴∠1+∠2=90°.故填90.