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
Polygons have as many vertices as they have sides (edges).
8 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
There are no curved edges in a pentagon. Part of the definition of any polygon is that they have straight edges.
I believe it has 5 edges?
9 edges