square
That's impossible. A shape has three or more sides/faces. There is NO shape that has one or two sides/faces
In a 3D world with 6 sides it is a cube.
An octahedron is a 3D shape with 8 sides.
Tin can, penny, ect.
A 3d shape can have infinite sides
sides are the face of a 3d shape and verticies are the corner of the shape
square
That is a Dodecahedron.
There is no specific name for such a shape.
A septadecahedron has 17 sides to it.
Pentadecagon; Pentakaidecagon
2D shape = Decagon 3D shape = Decahedron
dodecahedron
triangular pyramid.
Tetrahedron
Dodacohedron, I think.