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cosα = 6/6√2 = 1/√2 = √2/2
Czyli α = 45⁰
2. Pp = πr² = 16π
πr² = 16π
r² = 16
r = 4
Obwód podstawy = 2πr = 8π
Pb + 2Pp = Ppc
Pb = Ppc - 2Pp
Pb = 112π - 2 *16π = 112π - 32π = 80π
Pb = Obwód podstawy * H
80π = 8π * H /:8π
H = 10
V = Pp* H
V = 16π *10 = 160π