The word flat is an English word written and spoke by English Peoples thousands of years before engineering scientists were born and adopted that flat word used on earth. Any planet which has own gravitational force suitable for human being to walk, build house to live, to make more flat surface as road, city, further more flat surface as house flooring is known as flat surface. According to atomic theory electron, proton, neutron are considered as round cube with absolute smooth surface but has no gravitational force as a planet have for human beings to build house, road , city etc. These all scientific theories are after the birth of English Language.Stupid scientists mostly used that ancient word and applied it in a different manner without another word added or applied to it. So earth has flat surface. Similarly sea level is known as constant as it same all over the world. In civil engineering water level is also used to check flat surface on the surface of earth including flat road, building, flat flooring etc. So overall surface of earth is known as flat.
A mirror with a flat surface - planar
Its base is a flat surface
A flat surface generally refers to a horizontal surface and is referred to as the plane.
A flat surface is no more that a plain horizontal surface with no depth. For example the surface of a table top is a flat surface, that is the surface only, not the depth of the top or the rest of the table
A flat surface that extends forever is a plane
It does not have a flat surface.
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 is a flat surface with no thickness
A flat, level surface is a plane.
It is a drawing of the earth on a flat surface
A mirror with a flat surface - planar
Its base is a flat surface
A flat surface generally refers to a horizontal surface and is referred to as the plane.
A flat surface generally refers to a horizontal surface and is referred to as the plane.
All diamonds have a flat surface on the top of the cut. The cut with the largest flat surface is an emerald cut.
One flat surface is a table. Many flat surfaces are facets.
A flat surface is no more that a plain horizontal surface with no depth. For example the surface of a table top is a flat surface, that is the surface only, not the depth of the top or the rest of the table