File:Torus from rectangle.gif
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Torus_from_rectangle.gif （400 × 300像素，文件大小：262 KB，MIME类型：image/gif、循环、49帧、14秒）
| 描述 |
A torus can be constructed by two transformations on a rectangle. First, we bend along one direction, joining opposite sides, creating a cylinder. Then, we bend the cylinder so the ends are joined. The resulting figure is a torus. However, the second transformation does not preserve lengths on the surface, as can be observed by the extension and compression of the checkered pattern. Here's the diagram of this process:  |
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| 来源 | 自己的作品 | ||
| 作者 | Lucas Vieira | ||
| 授权 (二次使用本文件) |
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| 日期/时间 | 缩略图 | 大小 | 用户 | 备注 | |
|---|---|---|---|---|---|
| 当前 | 2012年5月22日 (二) 11:30 | | 400 × 300（262 KB） | wikimediacommons>LucasVB | {{Information |Description=A torus can be constructed by two transformations on a rectangle. First, we bend along one direction, joining opposite sides, in order to create a cylinder. Then, we bend the cylinder so the ends are joined. The resulting fig... |
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