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a=2
H=9
sześciokąt foremny = 6 trójkątów równobocznych
Ptr = a²√3 / 4
Ptr = 2²√3 / 4
Ptr = 4√3 / 4
Ptr = √3
Pp = 6 × Ptr
Pp = 6 × √3
Pp = 6√3 (j²)
Pb = 6 × (2 × 9)
Pb = 6 × 18
Pb = 108 (j²)
Pc = 2 Pp + Pb
Pc = 2 × 6√3 j² + 108 j²
Pc = 12√3 j² + 108 j²