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Króliczek13
A) Pb=9cm*15cm+12cm*15cm+5cm*15cm=135²+180cm²+75cm²=390cm² b) Pb=0,6dm*2,5dm+0,5dm*2,5dm+1dm*2,5dm+1,5dm*2,5dm= 1,5dm²+1,25dm²+2,5dm²+3,75dm²=9dm² c) Pb=2*0,3m*10m+2*0,03m*10cm=6m²+0,6m²=6,6m² d) Pb=6*1,2dm*0,9dm=6,48dm²
Pb=9cm*15cm+12cm*15cm+5cm*15cm=135²+180cm²+75cm²=390cm²
b)
Pb=0,6dm*2,5dm+0,5dm*2,5dm+1dm*2,5dm+1,5dm*2,5dm= 1,5dm²+1,25dm²+2,5dm²+3,75dm²=9dm²
c)
Pb=2*0,3m*10m+2*0,03m*10cm=6m²+0,6m²=6,6m²
d)
Pb=6*1,2dm*0,9dm=6,48dm²