jaka objetosc ma kula o polu powierzchni 64 pi?
pole kuli P = 4πr2
P= 4πr2
64π = 4πr2 (r do kwadratu)
16π = πr2
4=r
Objętość kuli
V =4/3 * πr3 (r do potęgi 3)
V= 4/3 * π 64
Pc=64π j²
4π·r²=64π /:4π
r²=16
r=√16=4
objetosc kuli:
V=4/3 πr³=4/3 π ·4³=4/3 π· 64=256π/3 =85⅓π j³
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pole kuli P = 4πr2
P= 4πr2
64π = 4πr2 (r do kwadratu)
16π = πr2
4=r
Objętość kuli
V =4/3 * πr3 (r do potęgi 3)
V= 4/3 * π 64
Pc=64π j²
4π·r²=64π /:4π
r²=16
r=√16=4
objetosc kuli:
V=4/3 πr³=4/3 π ·4³=4/3 π· 64=256π/3 =85⅓π j³