(2013•滨城区一模)(1)已知:如图(1),∠ABC=∠DCB,BD、CA分别是∠ABC、∠DCB的平分线,求证:AB=DC.
(2)如图(2),DE是△ABC的中位线,点F在DE上且∠AFB=90°,AB=5,BC=8,求EF的长.