File:Dandelin spheres and ellipse.gif
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Dandelin_spheres_and_ellipse.gif (400 × 400 pixels, file size: 248 KB, MIME type: image/gif, looped, 20 frames, 4.0 s)
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DescriptionDandelin spheres and ellipse.gif |
Русский: Эллипс как коническое сечение и шары Данделена. Показаны фокусы эллипса (две точки) и его директрисы (синие линии). — эксцентриситет эллипса, — угол между секущей плоскостью и осью конуса.
English: Ellipse as the conic section and Dandelin spheres. Foci of the ellipse are shown as two dots, directrices are blue lines. — eccentricity of the ellipse, — angle between the secant plane and the axis of the cone. |
Date | |
Source | Own work |
Author | Cmapm |
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 21:43, 26 June 2012 | 400 × 400 (248 KB) | Cmapm (talk | contribs) |
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