证：∵DC=AB,DF=BE,CF=AE,
∴△CFD≌△AEB
∴∠D=∠B
∵∠COD=∠AOB
∴△AOB≌△COD
∴AO=CO; OD=OB
∵OE=OB-BE
OF=OD-DF
∴OE=OF
已知DC=AB,DF=BE,CF=AE,求证:AO=CO,EO=FO
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