If you say this shape is 18 sided i would guess it has 18 sides. ;)
The name of a 18 sided polygon is Octadecagon.
The interior angles of an 18 sided polygon add up to 2880 degrees
octadecagon is the name of a 2 d 18 sided polygon. The octa part is for 8 and the deca is for 10 since 18=10+8
A hexagonal prism.
All I can tell you is that a 16 sided shape is called a Hexadecagon
If it is a 2 dimentional shape it is called an 'octadecagon'
Octadecadron
An 18 sided shape is called a octadecagon. This refers to both 2 dimensional and 3 dimensional shapes in a mathematical sense.
An eighteen-sided shape is called an octakaidecagon, or octadecagon.
A polygon refers to a plane figure that has at least three straight sides and angles. An 18 sided shape is called an octadecagon or octakaidecagon.
Two polyhedrons have 18 edges: truncated tetrahedron and hexagonal prism.
a shape that has 9 faces
Tetrahaidecahedron
octadecagon
enneadecagon or enneakaidecagon
no