I wonder if the unsolved problem of drilling a triangle hole is related to the g... | Hacker News

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		chime on Sept 1, 2009 \| parent \| context \| favorite \| on: Drilling a Square Hole (with a rotating bit) I wonder if the unsolved problem of drilling a triangle hole is related to the geometric problem of dividing a line into three equal parts with just a compass.

lucifer on Sept 1, 2009 [–]

You can't trisect an arc using only a compass and a straightedge. (You can simulate a straightedge using a compass.) Dividing a line into 3 parts is trivial.

sp332 on Sept 1, 2009 | [–]

Funny I'd forgotten that that was possible. http://upload.wikimedia.org/wikipedia/en/d/dc/Trisectsegment...

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