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P = 2 x 1 x 3 + 2 x 1 x 4 + 2 x 3 x 4 =6 cm + 8 cm + 24 cm =38 cm2
licze na nai :D
Pp=2ab=2*1*3=6
Pb=2bc+2ac=3*4*2+1*4*2=24+8=32
Pc=Pp+Pb=32+6=38 cm²