It is not a 3D shape.
It depends on the 3d shape.
a pyramid is a 3D shape :)
A camera is a 3D shape. A photograph is a 2D projection of a 3D shape onto a 2D shape.
is a square a 3d shape
Paper is a 3D object.
A heptagon is not a 3D shape. It is a seven sided shape. It could be designed on 3D software if necessary.
A shape in 3D is a polygon. Poly=many and gon=shape.
A 3d shape can have infinite sides
it mean 3d stans for dimensional shape
Many 3d shapes have a corner.