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(ASA)
(SSS) () 1△ABC △A’B’C’AB=A’B’,∠B=∠B’, ∠C=∠C’. △ABC≌△A’B’C’ 2 1
AB CD O OA=ODOC=OB △OAC≌△ODB 1M AB ∠C=∠D∠1=∠2 △AMC≌△BMD 2 94 1 2∠1=∠2∠C=∠DAC=BD. 1 ABCD AC ∠BADAB=ADAC ∠BAD 2 94 10.1 1.,△ABC≌△DEF (
) A. AB=DEBC=EF∠A=∠D
B. ∠A=∠D∠C=∠DAC=DF C. ∠B=∠E∠A=∠DAC=EF
D. AB=DEBC=EF∠B=∠D 2.5×5 ,1 ,△ABC ()△ ABC
3., ABCDE ,∠BCD=∠EDC=90 BC=EDAC=AD. (1)△ABC≌△AED (2)∠B=140 ∠BAE
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