b=3см
с=5см
S=?
а=√(с²-b²)=√(5²-3²)=4
S=a*b/2=3-4/2=6
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b=3см
с=5см
S=?
а=√(с²-b²)=√(5²-3²)=4
S=a*b/2=3-4/2=6