Template:Did you know nominations/Quadrisecant

Quadrisecant

 * ... that every knotted polygon in three-dimensional space can be touched at four points by a quadrisecant line (pictured)?
 * Reviewed: International Society for Soil Mechanics and Geotechnical Engineering

Created by David Eppstein (talk). Self nominated at 22:39, 28 July 2013 (UTC).


 * Symbol voting keep.svg Article is new enough and long enough, the image is appropriately sourced. The hook source is accepted in good faith. Cwmhiraeth (talk) 09:37, 29 July 2013 (UTC)