呵呵,这样做的.
(1)若点F在线段BC上
∵AE=AF ∠ABC=∠ADE=90° AB=AD
∴△ADE≌△ABF(HL)
(2)∵△ADE≌△ABF
∴BF=DE=2 FC=1
∴EF^2=FC^2+CE^2
=根号2
呵呵,容易吧,望采纳,谢谢.
呵呵,这样做的.
(1)若点F在线段BC上
∵AE=AF ∠ABC=∠ADE=90° AB=AD
∴△ADE≌△ABF(HL)
(2)∵△ADE≌△ABF
∴BF=DE=2 FC=1
∴EF^2=FC^2+CE^2
=根号2
呵呵,容易吧,望采纳,谢谢.