(1)DA=DB;∠DBE=∠DAF;∠FDA+∠ADE=∠BDE+∠ADE=90°;全等,证毕
(2)DA=DC;∠DAE=∠DCF=145°;下面证AE=CF,显然AE=PF,又因为∠CPF=45°,且△CPF为等腰直角,故CF=PF=AE;全等;证毕
(附图)
(1)DA=DB;∠DBE=∠DAF;∠FDA+∠ADE=∠BDE+∠ADE=90°;全等,证毕
(2)DA=DC;∠DAE=∠DCF=145°;下面证AE=CF,显然AE=PF,又因为∠CPF=45°,且△CPF为等腰直角,故CF=PF=AE;全等;证毕
(附图)