It depends on the 3d shape.
It is not a 3D shape.
A camera is a 3D shape. A photograph is a 2D projection of a 3D shape onto a 2D shape.
a pyramid is a 3D shape :)
is a square a 3d shape
what 3d shape is a tyre
Paper is a 3D object.
A marble has a spherical shape, and so has Mercury. But Mercury is a bit flattened at the poles, which a marble is not, so a marble is a more perfect sphere.
Many 3d shapes have a corner.
A 3d shape can have infinite sides
Its a 3d net that can be transformed into a 3d shape
A 12 sided 3D shape is a dodecahedron.