Yes. A lot like a sphere actually, but a big one.
An ellipsoid is a three-dimensional egg-shaped figure.
probably a sphere
It is a face of the 3-d figure.
A globe which is spherical shaped
If it's three dimensional, a 12 sided figure is a dodecahedron.
a polyhedron
All three dimensional figures have more faces than a one dimensional figure. There are an infinite number of one dimensional points on a three dimensional figure
An egg-shaped, three-dimensional shape is an ovoid.
Books, boxes, notebooks, and basically every three-dimensional figure with rectangular sides.
Pedantically, no. A polyhedron is a three dimensional figure (with some additional qualities). Polyhedra are three dimensional figures.
A pyramid is a four-sided, three-dimensional figure.
A square is not a three dimensional figure unless it is in the form of a cube.