8 edges
A heptagonal prism is a prism with a heptagon (7-sided polygon) as its base. It has 14 faces (2 heptagons and 12 rectangles), 20 vertices (2 at each corner of the heptagon and 2 at each corner of the rectangles), and 28 edges (7 edges on each heptagon base and 12 edges around the sides connecting the corresponding vertices of the base and top heptagon).
16 edges, 9 vertices.
It depends on the polygon
A nonagon has 9 sides
7 edges Seven
It has seven sides.
It has 7 sides
heptagon
8 edges
A pyramid with a heptagonal base will have seven edges at the bottom, and seven edges around the circumference, so 14 edges in total.
15 edges.
It has 8 edges.
A sphere has 0 edges.
9 edges
I believe it has 5 edges?
12