已知△ABC≌△DEF,∠A=85゜,∠B=60゜,AB=8,EH=5.求∠DFE的度数及DH的长.
问题描述:
已知△ABC≌△DEF,∠A=85゜,∠B=60゜,AB=8,EH=5.求∠DFE的度数及DH的长.
答
∵△ABC≌△DEF,∠A=85゜,∠B=60゜,AB=8,EH=5,
∴∠D=∠A=85°,∠DEF=∠B=60°,DE=AB=8,
∴∠DFE=180°-∠D-∠DEF=35°,DH=DE-EH=8-5=3.