A 2D seven sided figure is called a heptagon. A 3D seven faced polygon is called a heptahedron.
A five sided 3d shape is called a pentehedron
Triskaidecahedron
There are many options. Some of these are: A pyramid with a base that is a 19 sided polygon; A dipyramid with a "centre" that is an 18 sided polygon; A prism with decagonal bases.
a 4 sided 3d shape is called a triangular prism!!!!!!!!!!!!!!!
A 2D seven sided figure is called a heptagon. A 3D seven faced polygon is called a heptahedron.
Triskaidecahedron
In geometry, a hendecagon (also undecagon or endecagon) or 11-gon is an eleven-sided polygon.
A 12 sided 3D shape is called a dodecahedron.
A five sided 3d shape is called a pentehedron
Triskaidecahedron
An 11-sided 3D shape is a hendecahedron.
There are many options. Some of these are: A pyramid with a base that is a 19 sided polygon; A dipyramid with a "centre" that is an 18 sided polygon; A prism with decagonal bases.
a 4 sided 3d shape is called a triangular prism!!!!!!!!!!!!!!!
A polygon is a two dimensional object so you cannot have a 3D 13-gon. It is either a 2D 13-gon or a 3D 13-hedron.
A polyhedron.
HEXADECAHEDRON is the correct name for a 16 sided 3D object