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to przekatna podstawy d=a√2=12√2 cm
z wlasnosci kata ostrego 45stopni wynika zaleznosc
d=H=12√2 cm
Pp=a²=12²=144cm²
Pb=4aH=4·12·12√2=576√2 cm²
Pc=2Pp+Pb=2·144+576√2 =288+576√2 =288(1+2√2)cm²