That will depend on what they are but in general 3D shapes have surface area and volume whereas 2D shapes have only surface area.
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 :)
what 3d shape is a tyre
is a square a 3d shape
Many 3d shapes have a corner.
A 3d shape can have infinite sides
A 12 sided 3D shape is a dodecahedron.
A cylinder is a 3d shape because you can see the in side of it.
A nonagon is a 2D shape and there is not a 3D equivalent shape.
A tridekahedron is a 3D 30 sided shape.