It depends on the polygon
8 edges
3 or more.
30
A polygon can have three or more edges and exactly the same number of vertices. All polygons have one face.
it has seven
8 edges
Polygons have as many vertices as they have sides (edges).
four
3 or more.
None because it has sides whereas a polyhedron has edges
15 edges.
It has 8 edges.
A sphere has 0 edges.
30
I believe it has 5 edges?
9 edges
There are no curved edges in a pentagon. Part of the definition of any polygon is that they have straight edges.