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tworząca -- l - 6 cm
d² = 2( l² )
d² = 2 × 36
d = √72 = 6√2
promień -- r = 1/2 d = 3√2
wysokość stożka -- h
h² + r² = l²
h² = 36 - (3√2)²
h = √18 = 3√2
V = 1/3π×r²×h
V = 1/3π × 18 × 3√2
V = 18√2π cm³