如图,△ABC≌△ADE,且∠CAD=10°,∠B=∠D=25°,∠EAB=120°,求∠BAC和∠DGB的度数．

∵△ABC≌△ADE,
∴∠DAE=∠BAC= 1/2（∠EAB-∠CAD）= 1/2(120°-10°)=55°．
∴∠DFB=∠FAB+∠B=∠FAC+∠CAB+∠B=10°+55°+25°=90°
∠DGB=∠DFB-∠D=90°-25°=65°．