**Objects that occupy space are called solid shapes. Their surfaces are called faces. Faces meet at edges and edges meet at vertices. The plane surface of a solid is called its face. An edge of a solid is a line segment, along which two faces meet. A point that is formed by three or more intersecting faces on a solid is called a vertex. Cube, cuboid, sphere, cylinder, cone and the pyramid are examples of solid shapes. Plane figures are two-dimensional while solid shapes are three-dimensional. The corners of solid shape are called its vertices, the line segments of its skeleton are its edges, and its flat surfaces are its faces.
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