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Ellipse |
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| $$\textbf{Der Flächeninhalt des Ellipse}$$ | ||||||
$$A = \pi · a · b$$ | ||||||
| $$\textbf{Der Umfang eines Ellipse}$$ | ||||||
| $$4 · a · \int_{0}^{\frac{\pi}{2}}\sqrt{1- k^2 \sin^2(\theta)} d\theta ,$$ | ||||||
| $$k = \frac{\sqrt{a^2-b^2}}{a}$$ | ||||||
| $$U \approx 2· \pi · \sqrt{½ · (a^2+b^2})$$ | ||||||