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Angle trisection  Hamming, Help
Posted:
Jan 3, 1995 9:45 AM


I've been reading Richard Hamming's excellent book, "The Art of Probability" when I came across the following on page 288:
"[There is a] ... wellknown theorem ... that with ruler and compass (in classical Euclidean geometry) you cannot trisect an arbitrary angle. The fact is that with two marks on the ruler you can."
This begs the obvious question: how is it done? What is the nature of the two marks?
E.

Erann Gat gat@robotics.jpl.nasa.gov



