Difference between revisions of "Foldable constant rectangle"
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== Foldable Constant Rectangle == | == Foldable Constant Rectangle == | ||
| − | A rectangle with these proportions maintains a constant aspect ratio when folded in half perpendicular to the long axis and rotated 90 degrees. | + | If you need a foldable rectangle then this is the foldable rectangle for you. A rectangle with these proportions maintains a constant aspect ratio when folded in half perpendicular to the long axis and rotated 90 degrees. |
In reasonable parts of the world this is the ratio used for paper. For example, [http://en.wikipedia.org/wiki/A4_paper_size A4 paper]. | In reasonable parts of the world this is the ratio used for paper. For example, [http://en.wikipedia.org/wiki/A4_paper_size A4 paper]. | ||
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== See Also == | == See Also == | ||
| − | + | Another interesting constant, [http://en.wikipedia.org/wiki/Golden_Ratio The Golden Ratio, φ]. | |
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Latest revision as of 19:36, 14 January 2012
Foldable Constant Rectangle
If you need a foldable rectangle then this is the foldable rectangle for you. A rectangle with these proportions maintains a constant aspect ratio when folded in half perpendicular to the long axis and rotated 90 degrees.
In reasonable parts of the world this is the ratio used for paper. For example, A4 paper.
Notes
Foldable Constant Rectangle Aspect Ratio = SQRT(2) = 1.414213562373 Video screen Aspect Ratio = 4/3 = 1.333... (Example: 640/480=1.333...)
Given a width of 640 pixels,
Video screen height = 640 / (4/3) = 480 Foldable Constant Rectangle height = 640 / SQRT(2) = 452.54833995939
Difference in height is
(640 / (4/3)) - (640 / SQRT(2)) = 27.45166004061 or approximately 27 pixels
See Also
Another interesting constant, The Golden Ratio, φ.
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