ABC=180-150=30°
CAB=180-(ABC+C)= 60°
CAA1=CAB:2=30°
C=90°;CAA1=30°, следует CA1=AA1:2=10
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ABC=180-150=30°
CAB=180-(ABC+C)= 60°
CAA1=CAB:2=30°
C=90°;CAA1=30°, следует CA1=AA1:2=10