如图,已知:在△ABC与△DEF中,∠A=44°,∠B=73°,∠D=44°,∠F=63°.求证:△ABC∽△DEF.
证明:在△DEF中,∠E=180°-∠D-∠F=180°-44°-63°=73°.∵∠A=∠D=44°,∠B=∠E=73°,∴△ABC∽△DEF.