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Mam nadzieję, że pomogłam;)
Pp = (8cm)² √3 : 4
Pp = 16√3 cm²
Pb = 8cm * 8cm * 3
Pb = 192cm²
Pc = 192cm² + 2*16√3 cm²
Pc = 192cm² + 32√3 cm²
V = Pp * H (obie wielkości znamy)
H = 8cm
V = 16√3 cm² * 8cm
V = 128√3 cm³