No.
For example, a cube is a polyhedron and 3 edges meet at each vertex.
Three edges meet at each vertex.
A vortex is a form of rotating fluid flow: for example a whirlpool. A vertex, on the other hand, is a point where lines meet. There can be two or more lines meeting at a vertex: there is no limit to how many. For example, the apex of a pyramid whose base is a polygon with n-sides, will be a vertex where n edges meet (for any integer n).
In an octahedron, four edges meet at each vertex. An octahedron has eight triangular faces, twelve edges, and six vertices, with each vertex being the meeting point of four edges.
In a cuboid, three edges meet at each vertex. A cuboid has eight vertices, and at each vertex, the three edges correspond to the three dimensions (length, width, and height) of the cuboid. Thus, every vertex is formed by the intersection of these three edges.
4
3
A vertex can be the corner of a polyhedron in which case at least three edges meet at a vertex.
Edges meet at a vertex.
3
Yes, a cube has both parallel and perpendicular edges. Each edge of the cube is parallel to another edge that runs in the same direction, while edges that meet at a vertex are perpendicular to each other. Specifically, three edges meet at each vertex, and each pair of these edges is perpendicular.
A vortex is an area of circular fluid flow in fluid dynamics and no edges meet there. A vertex is a corner of a geometric shape and there can be two or more edges meeting at a vertex. There is no upper limit to the number of edges.
The answer will depend on the polyhedron, but often it is 3.The answer will depend on the polyhedron, but often it is 3.The answer will depend on the polyhedron, but often it is 3.The answer will depend on the polyhedron, but often it is 3.