There is no such thing. A hexagon is a two dimensional figure. A three dimensional figure with six vertices is an octahedron.
The answer is in the question it is a 3 dimensional figure such as a pyramid
A two-dimensional shape that can be folded into a three-dimensional figure is often called a net.
It is the cross-section of the figure by the plane.
it's called a face
There is no such thing. A hexagon is a two dimensional figure. A three dimensional figure with six vertices is an octahedron.
It is a three dimensional figure of some sort.
The answer is in the question it is a 3 dimensional figure such as a pyramid
A two-dimensional shape that can be folded into a three-dimensional figure is often called a net.
It is the cross-section of the figure by the plane.
it's called a face
It is simply called a face.
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
Its called a net.
It is a cube
Pedantically, no. A polyhedron is a three dimensional figure (with some additional qualities). Polyhedra are three dimensional figures.
A two dimensional figure would be an oval or ellipse. A three dimensional shape could be called an ovoid.