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BD＝CD AB＝AC ∠B.＝∠C. ∠BAD＝∠CAD
AB=AC ∠B.=∠ C. BD=CD ∠BDA=∠CDA 
∠B=∠C ∠BDA=∠CDA AB=AC BD=CD
BD=CD ∠B=∠C AB=AC ∠BDA=∠CDA
AB=AC BD=CD ∠B.=∠C ∠BDA=∠CDA
AB=AC BD=CD ∠B=∠C ∠BDA=∠CDA
BC=BD ∠ACB=∠ADB AC=AD ∠CAB=∠DAB
AB＝AC BD＝CD ∠B＝∠C ∠BDA＝∠CDA
BC=BD. ∠ACB=∠ADB. AC=A D. ∠CAB=∠DAB 
AB=AC BD=CD ∠B.=∠C ∠BDA=∠CDA
BD=CD AB=AC ∠B=∠C ∠BAD=∠CAD
AB=AC BD=CD ∠B=∠C ∠BDA=∠CDA
AB=AC BD=CD ∠B=∠C ∠BDA=∠CDA
BD=CD AB=AC ∠B=∠C ∠BAD=∠CAD
BD=CD AB=AC ∠B=∠C ∠BAD=∠CAD
AB=AC BD=CD ∠B.=∠C ∠BDA=∠CDA 
BC=EF ∠A.=∠D AC=DF ∠C.=∠F.
BD=CD AB=AC ∠B.=∠C ∠BAD=∠CAD
∠2=∠ B. ∠1=∠ C. 
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