icosahedron but it is a 3d shape
sides are the face of a 3d shape and verticies are the corner of the shape
That is a Dodecahedron.
A septadecahedron has 17 sides to it.
Dodacohedron, I think.
2D shape = Decagon 3D shape = Decahedron
No 3D shape with FLAT SIDES has exactly 3 faces. 4 is the minimum.
Such a shape cannot exist because it is always possible to increase the number of sides by 1 by simply cutting off one vertex.
An octahedron is a 3D shape with 8 sides.
Tin can, penny, ect.
A square-based pyramid.
it is a 3D shape and has 4 sides
A 3d shape with 10 sides is called a decahedron. I have added a link with some pictures of them. As you can see they look very different but all have 10 sides or faces.
In a 3D world with 6 sides it is a cube.