File:Overhand-folded-ribbon-pentagon.svg
Summary
Description |
If a flat ribbon or strip is tightly folded into a simple overhand knot of practical knot-tying, it assumes a regular pentagonal shape. Here a ribbon which is green on one side and blue on the other is shown folded in this way. Non-overlapped hidden edges are shown by dotted lines of the appropriate color (except that the middle of one line has been removed where it would confusingly intersect the other hidden-edge lines if shown). If the two loose ends are joined, this becomes a trefoil knot of mathematical knot theory. |
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Self-made image, generated from the following PostScript vector source code: %! 300 396 translate 1.3172 dup scale /X{72 mul 90 add}def/I{X cos 100 mul}def /J{X sin 100 mul}def 4 I 4 J moveto 0 I 0 J lineto 1 I 1 J lineto 1.75 X cos 111.8 mul 1.75 X sin 111.8 mul rlineto 3 X cos 111.8 mul 3 X sin 111.8 mul rlineto 2 I 2 J lineto closepath gsave .87 .97 .87 setrgbcolor fill grestore .2 .65 .3 setrgbcolor 2 setlinewidth stroke 3 I 3 J moveto 1 I 1 J lineto 0 I 0 J lineto 4 I 4 J lineto 3.25 X cos 111.8 mul 3.25 X sin 111.8 mul rlineto 2 X cos 111.8 mul 2 X sin 111.8 mul rlineto closepath gsave .92 .96 1 setrgbcolor fill grestore .2 .3 .55 setrgbcolor stroke 4 I 4 J moveto 0 I 0 J lineto 2 I 2 J lineto 3 I 3 J lineto closepath gsave .92 .96 1 setrgbcolor fill grestore stroke [5.2] 5.2 setdash 3 I 3 J moveto 1 I 1 J lineto stroke .2 .65 .3 setrgbcolor [5.14] 5.14 setdash 2 I 2 J moveto 1 I 1 J lineto stroke 3 I 3 J moveto 0 I 0 J lineto stroke 2 I 2 J moveto 4.25 X cos 45 mul 4.25 X sin 45 mul rlineto stroke 4 I 4 J moveto 1.75 X cos 45 mul 1.75 X sin 45 mul rlineto stroke showpage %EOF |
Author | AnonMoos |
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Category:Unchecked SVG validity |
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I, the copyright holder of this work, release this work into the public domain. This applies worldwide. In some countries this may not be legally possible; if so: I grant anyone the right to use this work for any purpose, without any conditions, unless such conditions are required by law. |