В=90-30=60°
sinB=AC/AB
кор3/2=кор3/АВ
АВ=2
ВС=АВ/2=2/2=1
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В=90-30=60°
sinB=AC/AB
кор3/2=кор3/АВ
АВ=2
ВС=АВ/2=2/2=1