在△DFE中 ∵∠FDE=64°,∠DEF=43°∴∠DFE=180º-64º-43º=73º∵∠DFE=∠ACF+∠FAC∠FDE=∠BAD+∠ABD∠DEF=∠BCE+∠EBC∠BAC=∠BAD+∠FAC ∠BAD=∠ACF∴∠BAC=∠DFE=73°∵∠ABC=∠ABD+∠CBE ∠C...