A vertex can be the corner of a polyhedron in which case at least three edges meet at a vertex.
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vertex
2.
It is a vertex and its plural is vertices
1 corner,0 vertices and 0 edges * * * * * A vertex is the same as a corner, so a cone has 1 vertex. It has two faces: one circular and one curved. It has one edge where the two faces meet.
A dodecahedron has 12 regular pentagonal faces, 20 vertices, and 30 edges. Three faces meet at each vertex.