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Pb=192 cm²
Pc=256cm²
Pc=Pp+Pb
256=Pp+192
256-192=Pp
Pp=64cm²
czyli Pp=a²
a²=64
a=64=8cm --->dl,kraw,podstawy ostroslupa
Pb=4·½ah=2ah
192=2·8h
192=16h /;16
h=12cm --->dl,wysokosci sciany bocznej
z pitagorasa
(1/2a)²+H²=h²
4²+H²=12²
H²=144-16
H=128=8√2 cm--->wysokosc bryly
objetosc ostroslupa
V=1/3Pp·H=1/3·64·8√2=(512√2)/3 cm³