Zadanie
a = 6
b = 8
Pp = a²
Pp = 6² = 36 (j²)
Pb = 4 · a · b
Pb = 4 · 6 · 8 = 24 · 8 = 192 (j²)
Pc = 2·Pp + Pb
Pc = 2 · 36 + 192 = 72 + 192 = 264 (j²)