设△ABC和△A1B1C1,AB=A1B1,BC=B1C1,中线AD=A1D1
D和D1是中点,所以:
BD=BC/2
B1D1=B1C1/2
BC=B1C1
所以:BD=B1D1
AB=A1B1,AD=A1D1
△ABD≌△A1B1D1
∠B=∠B1
AB=A1B1,BC=B1C1
△ABC≌△A1B1C1.
设△ABC和△A1B1C1,AB=A1B1,BC=B1C1,中线AD=A1D1
D和D1是中点,所以:
BD=BC/2
B1D1=B1C1/2
BC=B1C1
所以:BD=B1D1
AB=A1B1,AD=A1D1
△ABD≌△A1B1D1
∠B=∠B1
AB=A1B1,BC=B1C1
△ABC≌△A1B1C1.