(2)AB=AD=AF,AC=AE,BC=DE,CD=EF,? Bad =? CAE=? DAF? BAC=? DAE? CAD=EAF,? BCA=? DEA,? ACD=? AEF? ABC=? Ed. BCD=? DEF,? ADC=? AFE。
2. No, because the distance from the corresponding point to the rotation center should be equal before and after rotation, and OA? OC,OB? OD, so you can't rotate around the O point, so the AB line and the CD line coincide.
Bian Xiao suggested: