A heptagon is a figure with 7 sides. Also, if by corner you mean edges, we can find that.
There's the edges of the heptagonal base. So there's 7.
Then we have the edges of where the lateral faces meet each other. There's another 7.
You have 14 edges in a heptagonal pyramid.
If, in fact, you meant "corners", then we add in the vertex (or apex) of the pyramid. Then you will have 15 "corners".
Faces = 8 Edges = 14 Corners = 8
there is 13 edges in a heptagonal pyramid.
A nonagon based pyramid. An octagon based dipyramid. An octagonal base with a double-apex "pyramid". A heptagonal base with a triple-apex "pyramid". A heptagonal pyramid with a double-apex "pyramid" on the other side. A pentagonal prism. There are many more.
A cuboid or a pyramid with a heptagonal base are two possibilities.
a heptagonal pyramid has 8 faces
7
A heptagon has 7 corners.
8. There are 7 vertices on the heptagon, and 1 vertex for the top of the pyramid.
Heptagonal is an adjective: the answer depends on the noun that it refers to. A heptagonal pyramid, a heptagonal dipyramid or a heptagonal prism or some other heptagonal shape?
A heptagonal what? Prism, pyramid or something else?
21
A heptagonal based pyramid has: 8 faces 8 vertices & 14 edges