definition
 Vertices: The corners of a solid shape are called its vertices.
 Edge: The line segments of a solid shape mean its skeleton is called its edges.
 Faces: The flat surfaces of a solid shape are called its faces.
notes
Faces, Edges, and Vertices:

The corners of a solid shape are called its vertices.

The line segments of a solid shape mean its skeleton is called its edges.

The flat surfaces of a solid shape are called its faces.

The 8 corners of the cube are its vertices. The 12 line segments that form the skeleton of the cube are its edges. The 6 flat square surfaces that are the skin of the cube are its faces.
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