[tex]Pb_{I} =4\cdot (6cm\cdot 6cm )=144~cm^{2} \\\\Pb_{II} =(10cm\cdot 9cm )+ (4cm\cdot 9cm)+2\cdot (5cm\cdot 9cm)=90~cm^{2} +36~cm^{2} +90~cm^{2} =216~cm^{2} \\\\Pb_{III} =2\cdot (6cm\cdot 9cm)+(8cm\cdot 9cm)=108~cm^{2} +72~cm^{2} =180~cm^{2} \\\\Pb_{IV} =2\cdot (5cm\cdot 8cm)+2\cdot (3cm\cdot 8cm)=80~cm^{2} +48~cm^{2} =128~cm^{2}[/tex]
[tex]Pb_{I} =1,44~dm^{2} \\\\Pb_{II} =2,16~dm^{2} \\\\Pb_{III} =1,8~dm^{2} \\\\Pb_{IV} =1,28~dm^{2}[/tex]
[tex]Pb_{II} -Pb_{III} =216~cm^{2} -180~cm^{2} =36~cm^{2} \\\\Pb_{II} -Pb_{IV} =216~cm^{2} -128~cm^{2} =88~cm^{2}[/tex]
[tex]Odp:\\\\B.~~I~~i~~IV~~oraz~~C.~~II~~i~~III[/tex]
