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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.
how many flat surfCES does a cylinder have?
An hemisphere is half of a globe with a circular flat base, a round edge, a curved surface but no vertices.
You count them. Let's look at a square, it has 4 edges. Just count the sides of the shape. Vertice = corners (point) Faces = the flat surface areas Edges = sides of the shape that makes up the shape like the outline of a shape.
a sphere, of course!