膜拜大神😊

膜拜大神😊
膜拜大神😊
 

膜拜大神😊
过点B作BG//CD交AF延长线于G
BG//CD =>∠G=∠CEG ,∠CEG=∠AED=∠DAE =>∠G=∠DAE =>BA=BG ---(1)
DA=DE=DB =>Rt△ABE =>BE⊥ AG ----(2)
(1)(2 )=>AE=EG ----(3)
CF=EF =>∠CEF=∠ECF ---(4)
BG//CD =>∠G=∠CEF ,∠GBF=∠ECF ---(5)
(4)(5) =>∠G=∠GBF =>FB=FG ---(6)
(3)(6) =>AE=EG=EF+FG=CF+FB=BC