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edge
its called a face an edge is called en edge a point is called a vertex
Not much, other than they both can be parts of a 3-dimensional figure. "Vertices" is plural of "vertex", which is a point. The vertex of an angle, for example, is the point of intersection between two lines. 2-dimensional and 3-dimensional figures can have vertices. An "edge", however, is a line segment, and only 3-dimensional figures (cubes, pyramids, etc) can have edges. An edge is the intersection of two sides of a figure.
When two sides (called faces) of a 3-dimensional shape meet, they meet at an edge.
No because it's 3 dimensional but a straight line is 1 dimensional