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Paper-Folding an Ellipse
Start with a circle drawn on paper and mark a point inside it. Fold the circle so that the circumference touches the point. Make a firm crease. Repeat, using random folds. The creases form the envelope of an ellipse.
Contributed by:
Borut Levart
THINGS TO TRY
Drag Locators
SNAPSHOTS
DETAILS
The locator represents the point inside the circle. You can move the locator and vary the number of creases.
Reference
[1] D. Wells,
The Penguin Dictionary of Curious and Interesting Geometry
, London: Penguin, 1991.
PERMANENT CITATION
Borut Levart
"
Paper-Folding an Ellipse
"
http://demonstrations.wolfram.com/PaperFoldingAnEllipse/
Wolfram Demonstrations Project
Published: April 28, 2014
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