File:Вписанный правильный икосаэдр и четыре плоскости.gif
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Вписанный_правильный_икосаэдр_и_четыре_плоскости.gif (400 × 400 pixels, file size: 957 KB, MIME type: image/gif, looped, 30 frames, 6.0 s)
Summary
| Description |
Русский: Правильный икосаэдр (зелёные линии), вращающийся в его описанной сфере. Показаны четыре круга сферы, соответствующие четырём параллельным плоскостям, в которых лежит по три вершины икосаэдра, образующие четыре правильных треугольника. Этот факт доказан Паппом Александрийским. Нарисовано в Maple.
English: Regular icosahedron (in green) rotating inside its circumscribed sphere. Also shown are four circles of the sphere, corresponding to four parallel planes in which lie vertices of the icosahedron, forming four equilateral triangles. This fact was proved by Pappus of Alexandria. The animation was created in Maple. |
| Date | |
| Source | Own work |
| Author | Illustr |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 15:58, 18 April 2017 | | 400 × 400 (957 KB) | wikimediacommons>Illustr | increasing thickness, making background with transparency=0.7 |
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