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Here is an animation showing how it works: http://upload.wikimedia.org/wikipedia/en/2/20/Rouleaux_triangle_Animation.gif http://upload.wikimedia.org/wikipedia/

• misterbwong 17y ago
  The link above is an animation of the Rouleaux Triangle and will draw a square with rounded corners. In this article, the author talks about a variant of that triangle that will draw exact squares.
• silentOpen 17y ago
  That's only the Rouleaux bit. The article details a bit that produces sharp (vs. rounded) squares.
  • uuilly 17y ago
    It was confusing b/c the pictures didn't show that the bit's axel had to orbit independently of the bit. This animation cleared that up for me even if it wasn't the exact case.