Odpowiedź:
z.1 2 r = 3√2*√2 = 6
r = 3
h = r = 3
V = [tex]\frac{1}{3}[/tex] π r²*h = [tex]\frac{1}{3}[/tex] π *3²*3 = 9 π [ cm³]
z.2
2 α = 120°
α = 60° h = 5 cm
[tex]\frac{r}{5}[/tex] = tg 60° = √3
r = 5√3
V = [tex]\frac{1}{3}[/tex] π *( 5√3)²* 5 = 125π [ cm³ ]
z.3
2 r = 8 cm
r = 4 cm
Pb = 4 Pp
2π*r*h = 4 πr² / (2 π *r)
h = 2 r = 8 cm
V = π r²*h = π*4²*8 = 128 π [ cm³ ]
Szczegółowe wyjaśnienie:
