8 edges
16 edges, 9 vertices.
It depends on the polygon
A nonagon has 9 sides
2 edges, 0 corners, 2 faces
7 edges Seven
It has seven sides.
It has 7 sides
heptagon
A pyramid with a heptagonal base will have seven edges at the bottom, and seven edges around the circumference, so 14 edges in total.
8 edges
15 edges.
It has 8 edges.
A sphere has 0 edges.
I believe it has 5 edges?
9 edges
12