It is a three-dimensional figure with eleven plane surfaces.
Hendecahedron
A hendecahedron.
Hendecahedron
It is a hendecahedron.
-8
I want to say hendecahedron-- is that close?
An 11-sided 3D shape is a hendecahedron.
It has 11 plane faces and if my 3D visualization powers are correct I count 20 edges.
a henagon is an 11 sided 2-D shape and a 3-D is called an hendecahedron.
It has 11 faces, 20 Edges and 11 vertices. (in my point of view) Luv 1RosalieCullen1 (Stardoll)
A decagon based pyramid. It is a hendecahedron but that can take many shapes. A nonagon based prism, for example.
Two words that begin with the prefix "hendec-" are "hendecagon" (an 11-sided polygon) and "hendecasyllabic" (having 11 syllables).