Question

有图,1.如图7,已知AD=AE,∠B=∠C,说明BD=CE的理由 2.如图8,已知OA=OB,OC=OD,∠AOC=∠

Answer 1

1.AD=AE

∠B=∠C

∠A=∠A

△ACD≌△ABE

AB=AC

AB=AD+BD

AC=AE+CE

AE=AE

BD=CE

2.∠AOC=∠BOD

∠AOC=∠AOB+∠BOC

∠BOD=∠AOB+∠AOD

∠BOC=∠AOD

OA=OB

OC=OD

△AOD≌△BOC

AD=BC