Question

Meeting point of three edges of a solid

Answer 1

Answer:

A face is a flat surface on a solid, and edges are the lines at which faces meet, and a vertex is the point at which when three or more edges meet.

Answer 2

Answer:

Since, a solid is a polyhedron if it is made up of only polygonal-faces, the faces meet at edges with one line segment and the edges meeting at a point. The point is generally called as vertex. But all the faces of option (c) are not polygons, there is a circular base, so the figure is not a polyhedron.