Worlds of David Darling
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delta curve





A curve that can be turned inside an equilateral triangle while continuously making contact with all three sides. There are an infinite number of delta curves, but the simplest are the circle and lens-shaped delta-biangle. All the delta curves of height h have the same perimeter, 2πh/3.


Related entries

   • Reuleaux triangle
   • rotor


Related category

   • PLANE CURVES