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(2006•宁波)如图,直角梯形ABCD中,AD∥BC,AB⊥BC,AD=3,B...
(2006•宁波)如图,直角梯形ABCD中,AD∥BC,AB⊥BC,AD=3,BC=5,将腰DC绕点D逆时针方向旋转90°至DE,连接AE,则△ADE的面积是( )
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A.1
B.2
C.3
D.4
考点分析:
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