(1)在△ABC和△DCB中
AB=DC
AC=DB
BC=BC
∴△ABC≌△DCB
∴∠A=∠D
(2)在△ ABC和△ADC中
AB=AD
BC=DC
AC=AC
∴△ABC≌△ADC
∴∠B=∠D,∠BAC=∠DAC,∠BCA=∠DCA