(AE^2)=(12^2)+(5^2)⇒AE=13
∠AMP=∠AED=90°-∠MAP
∴RT△APM∼RT△ADE
∴AP/AD=PM/DE⇒6.5/12=PM/5⇒PM=65/24
过M作MG⊥BC于G,
易证RT △NMG≅RT△EAD
MN=AE=13
∴PN=13-65/24=247/24
∴PM/PN=65/247
(AE^2)=(12^2)+(5^2)⇒AE=13
∠AMP=∠AED=90°-∠MAP
∴RT△APM∼RT△ADE
∴AP/AD=PM/DE⇒6.5/12=PM/5⇒PM=65/24
过M作MG⊥BC于G,
易证RT △NMG≅RT△EAD
MN=AE=13
∴PN=13-65/24=247/24
∴PM/PN=65/247