可延长DE至F,使EF=BC,可得△ABC≌△AEF,连AC,AD,AF,可将五边形ABCDE的面积转化为两个△ADF的面积,进而求出结论.延长DE至F,使EF=BC,连AC,AD,AF,
∵AB=CD=AE=BC+DE,∠ABC=∠AED=90°,
由题中条件可得Rt△ABC≌Rt△AEF,△ACD≌△AFD,
∴SABCDE=2S△ADF=2× •DF•AE=2× ×2×2=4.
故答案为:4.
可延长DE至F,使EF=BC,可得△ABC≌△AEF,连AC,AD,AF,可将五边形ABCDE的面积转化为两个△ADF的面积,进而求出结论.延长DE至F,使EF=BC,连AC,AD,AF,
∵AB=CD=AE=BC+DE,∠ABC=∠AED=90°,
由题中条件可得Rt△ABC≌Rt△AEF,△ACD≌△AFD,
∴SABCDE=2S△ADF=2× •DF•AE=2× ×2×2=4.
故答案为:4.