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V= a²H
80=16 H
H=5 cm
P=2a²+4×aH=2×16+4×20=112 cm²
Prosze bardzo, byłoby mi miło, gdybym dostała naj :)
Pozdrawiam
H=80/4/4=5cm
a=4cm ; b=4cm ; H=5cm
Pc=2*4*4+4*4*5=32+80=112cm²