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V=1/3a²h
l²=h²+(1/2a)²
h-wysokosc
a-krawedz podstawy
h=2a
V=5i 1/3=16/3
1/3a²h=16/3
a²h=16
a²(2a)=16
2a³=16
a³=8
a=2
h=2a=4
l²=h²+(1/2a)²
l²=4²+1²
l=√17
Pc=2²+2*2*√17=4+4√17