it is a isocahedron
* * * * *
Sadly, the wrong answer. All you need to do is cut one vertex off and you increase the number of sides by 1. Since you can always increase the number of sides by cutting off a vertex, there cannot be a shape with the most sides.
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.
A septadecahedron has 17 sides to it.
Pentadecagon; Pentakaidecagon
2D shape = Decagon 3D shape = Decahedron
Such a shape cannot exist because it is always possible to increase the number of sides by 1 by simply cutting off one vertex.
triangular pyramid.
Icosahedron
Cube/Cuboid
cube