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Pc=Pp+Pb = 6*8 + Pb= 48+280=328 cm²
Pb = 2 * 6 * 10 + 2 * 8 * 10
Pb = 120 + 160
Pb = 280 cm
Pc = Pb + 2Pp
Pp = a * b
Pp= 6 * 8
Pp = 48 cm
Pc = 280 + 2 * 48
Pc = 376 cm kwadratowych