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b=3cm
c=5cm
Pc=2ab+2c(a+b)
Pc=2*6*3+2*5(6+3)=36+10*9=36+90=126 cm²
to Pp=ab=3·6=18cm²
wysokosc bryły H=5cm
Pb=2aH+2bH=2·3·5+2·6·5=30+60=90cm²
pole calkowite bryły
Pc=2Pp+Pb=2·18+90=36+90=126 cm²