Difference between revisions of "Foldable constant rectangle"
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Revision as of 23:39, 16 January 2008
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.
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.
