A flat surface that extend infinitely in all directions is called a plane.
It is called as a plain.
A flat surface extending in all directions is a plane.
plane
A plane
A flat surface that extend infinitely in all directions is called a plane.
It is called as a plain.
A flat surface extending in all directions is a plane.
plane
The flat surface that goes on and on in all directions has no boundaries. This flat surface is called infinite surface. Accordingly, the answer is that the flat surface that goes on and on in all directions is called an infinite surface.
a plane
a compass
The flat area extending from the top of the backseat to the rear window is called "the deck" or "the rear deck" in American English.
The continental shelf.
A plane
It is a plane that extends indefinitely in all directions. It is very easy to remember just think about what flys in the air and needs to land on a "flat surface that extends indefinitely in all directions" (the ground).
A plane. Or, to be more exact, an infinite plane.