正方形ABCD BE‖AC CE=AC 叫AB与点E 就角ECA 证AF=AE

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正方形ABCD BE‖AC CE=AC 叫AB与点E 就角ECA 证AF=AE
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正方形ABCD BE‖AC CE=AC 叫AB与点E 就角ECA 证AF=AE
正方形ABCD BE‖AC CE=AC 叫AB与点E 就角ECA 证AF=AE

正方形ABCD BE‖AC CE=AC 叫AB与点E 就角ECA 证AF=AE
过B做BM⊥AC,EN⊥AC,BM=EN=1/2AC=1/2CE
∠ACE=30,∠CAE=∠CEA=75,
∠AFE=∠CAB+∠ACE=45+30=75
∠AEC=∠AFE
AF=AE