Volume: Verskil tussen weergawes
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Lyn 17:
:<math>I=\int_{x=-r}^r \int_{y=-\sqrt{r^2-x^2}}^{\sqrt{r^2-x^2}}\int_{z=0}^h dzdydx = 2h\int_{-r}^r \sqrt{r^2-x^2}dx=\pi r^2h</math>
==Formule vir volumes==
::<math>Sfeer: V = \frac{4}{3}\pi r^2</math>
{{saadjie}}
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