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h=5√3
V=50√3
V=Pp*H
50√3=Pp*5√3 /:5√3
Pp=10
Pp=a²
10=a²
a=√10
a=√4*2,5
a=2√2,5
50√3cm³=⅓a²×5√3/:√3
50=⅓a²×5
a²=50:⁵/₃
a²=30
a=√30cm = krawędź podstawy