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a-krawędź podstawy
Pp=a²
100=a²
a=√100
a=10cm
Ps-pole sciany bocznej
h-krawędź boczna
Ps=a*h
50=10*h|:10
h=5cm
V=100*5=500cm³
więc
a=10cm
Pboczne=50cm²
więc
h=5cm, bo 5cm*10cm=50cm²
V=100cm²*5cm=500cm³