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(本小题满分7分)
(1)(3分)计算:
(2)(4分)已知:如图,在Rt△ABC和Rt△BAD中,AB为斜边,AC=BD,BC,AD相交于点E.
求证:AE=BE.
(本小题满分7分)(1)(3分)计算: (2)(4分)已知:如图,在Rt△ABC和Rt△BAD中,AB为斜边,AC=BD,BC,AD相交于点E.求证:AE=BE.