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√3 /3 =8/r
r= 3*8 / √3
r= 24/ √3= 24√3 /3 = 8√3
V= 1/3 π r²H
V= 1/3 π (8√3)² *8 = 1/3 π 192*8 = 512π (jednostek ³)
8cm=x
l=2x czyli16cm
r=√3
r=8√3
V=1/3*πr²*H
V=1/3*192π*8
V=64π*8
V=512πj³(lub cm³)
a√3/2 = 8√3/2 = 4√3
v = 1/3 πr2 x h
v = 1/3 π (4√3)2 x 8
v = 1/3 π 16 x 3 x 8
v = 128 π
x - znak mnożenia
/ - kreska ułamkowa