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H- wysokość ostrosłupa
rys1:
Pp = 3 *3 = 9
V = 1/3 9 * 4 = 12
rys 2:
Pp = a2 pierwiastek z 3 / 4
PP = 42 pierwiastek z 3 / 4
Pp = 4 pierwiastek z 3
V = 1/3 4 pierwiastek z 3 * 5 = 1/3 20 pierwiastek z 3
rys3:
Pp = 6 *a2 pierwiastek z3 / 4 = 6 pierwiastków z 3
V = 1/3 6 pier z 3 *3 =6 pier z 3