oblicz objętosc kuli o polu powierzchni równym 4 pi cm kwadratowych
dane: P kuli=pi cm2 szukane : V kuli=? P k=4 pi r2------pi=4 pi r2 /:pi 1=4 r2 /:4 r2=1/4 r=1/2V=4/3* pi* r3 V=4/3 *pi *1/8 V=1/6 pi cm3
PROSZE
P=4π cm²
P=4πr²
4πr²=4π /:4π
r²=1
r=√1
r=1
V=4/3πr³
V=4/3π*1³
V=4/3π cm³
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dane: P kuli=pi cm2 szukane : V kuli=? P k=4 pi r2------pi=4 pi r2 /:pi 1=4 r2 /:4 r2=1/4 r=1/2
V=4/3* pi* r3 V=4/3 *pi *1/8 V=1/6 pi cm3
PROSZE
P=4π cm²
P=4πr²
4πr²=4π /:4π
r²=1
r=√1
r=1
V=4/3πr³
V=4/3π*1³
V=4/3π cm³