习题12.2 如图 AB=AC AD =AE 求证∠B=∠C
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习题12.2 如图 AB=AC AD =AE 求证∠B=∠C
如图,DE//BC,请问AD:AC=AE:AB?AD:AE=AB:AC?
如图,AB⊥AC,AC⊥DC,AD=AB.试说明AD∥CB.
如图,AB=AD,AC=AE,
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已知:如图,AC/AD=AB/DE=BC/AE.求证AB=AE
已知,如图,AD/AC=DE/AB=AE/BC,求证AB=AE