Объяснение:
а)s=1/2absina= 6*4*1/2=12см
б)s=1/2absina=14*7√3*√3/2=14см
в)s=1/2absina=3*4√2*√2/2=12см
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Объяснение:
а)s=1/2absina= 6*4*1/2=12см
б)s=1/2absina=14*7√3*√3/2=14см
в)s=1/2absina=3*4√2*√2/2=12см