undecagon

n.

十一边形；

Solving quintic equations by Paper Folding : Constructions of quintic roots, angle quitisection and the regular undecagon by 3-fold ...
Discussions: Construction of the Regular Undecagon by a Sextic Curve
Methods and apparatus for vertebral stabilization using sleeved springs
Enhanced-light-collection-efficiency sensor
Conrad Freiburg: LINDA WARREN GALLERY
A study of particular methods for the approximate construction of some regular polygons by using Mathematica 3.0
Hendecagon
EDUCATIONAL TOY CONSTRUCTION KIT
EDUCATIONAL TOY CONSTRUCTION KIT
Multidimensional data display and manipulation system and methods for using same