A five sided 3d shape is called a pentehedron
A 12 sided 3D shape is called a dodecahedron.
a henagon is an 11 sided 2-D shape and a 3-D is called an hendecahedron.
a 4 sided 3d shape is called a triangular prism!!!!!!!!!!!!!!!
Hendecahedron
the name of a 20 sided 3d shape is called a icosahedron
It is called a heptahedron.
pentagon
icosahedron
Heptrahedron
tetrahedron
tricotakaidihedron*