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tworząca to a√2
a√2=2√2
a=2
r=2
h=2
v=⅓πr²h=⅓π×2³=⁸/₃πj.³
skoro kąt rozwarcia ma 90 stopni, to pozostałe mają po 45
2r = l√2
2r = 4
r = 2
H = √8-4
H = 2
V = ⅓ π r²H
V= ⅓ π 8
V= 8π/3