(1)∵AD//BC
∴∠DAB+∠ABC=180°
∵AE平分∠DAB、BE平分∠CBA
∴∠EAB+∠ABE=1/2(∠DAB+∠ABC)=90°
∴ ∠AEB=90° ,
∴AE⊥BE
(2) 证明:由AD//BC 得AF//BC, 则∠CBF=∠AFB(内错角)
又EB为∠CBA的...
(1)∵AD//BC
∴∠DAB+∠ABC=180°
∵AE平分∠DAB、BE平分∠CBA
∴∠EAB+∠ABE=1/2(∠DAB+∠ABC)=90°
∴ ∠AEB=90° ,
∴AE⊥BE
(2) 证明:由AD//BC 得AF//BC, 则∠CBF=∠AFB(内错角)
又EB为∠CBA的...