Odpowiedzi

2010-04-10T18:12:59+02:00
Tg30= 8/r
√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)
2010-04-10T18:17:58+02:00
H=8cm
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)
2010-04-10T18:21:45+02:00
1/2a=1/2 x 8 = 4

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