A plane horizontal surface with no depth refers to a flat area on a curved surface.
When the two surfaces touch but do not intersect one another.
A tangent
It has a curved surface.
A surface is a 2-dimensional manifold. Most surfaces are curved, in which for a small "differential" section of a surface, a plane figure is uniquely determined.
A surface having no equivalent point at any plane
A plane horizontal surface with no depth refers to a flat area on a curved surface.
It is a mirror whose reflecting surface is curved, not flat (as in a plane mirror).
a plane
None. There is one curved suface but no plane surface.
Yes, but not on a plane surface; only on a curved surface.
When the two surfaces touch but do not intersect one another.
It is a mirror whose reflecting surface is curved, not flat (as in a plane mirror).
Four. Plane, Concave, Convex, and Curved
A tangent
It has a curved surface.
A sphere that has been sliced by a plane will have a circular base and a curved surface. In the special case that this plane goes through the centre of the sphere, the shape will be a hemisphere. in simple terms it would actually be a cone...