Hendecahedron
a hen decagon
A 12 sided 3D shape is called a dodecahedron.
An 11-sided 3D shape is a hendecahedron.
In geometry, a hendecagon (also undecagon or endecagon) or 11-gon is an eleven-sided polygon.
the name of a 20 sided 3d shape is called a icosahedron
a 4 sided 3d shape is called a triangular prism!!!!!!!!!!!!!!!
HEXADECAHEDRON is the correct name for a 16 sided 3D object
tetrahedron
tricotakaidihedron*
Triskaidecahedron
Octadecadron
It is called Triacontakaitetrahedron.