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Improved Answer:-
An heptagon has 7 sides but a pentagon has 5 sides
Heptagonal is an adjective, not a noun! The answer will depend on whether you mean a heptagonal pyramid, a heptagonal bipyramid, a heptagonal prism or whatever.
A heptagonal prism has 7 lateral edges. This is because a heptagonal prism consists of two heptagonal bases connected by vertical edges, and each vertex of the heptagonal base corresponds to a lateral edge. Since a heptagon has 7 sides, there are 7 lateral edges in total.
A heptagonal what? Prism, pyramid or something else?
In a heptagonal prism, there are 7 rectangular lateral faces along with 2 heptagonal bases. The rectangular faces have edges that are perpendicular to the edges of the heptagonal bases. Therefore, there are 7 faces with perpendicular edges in a heptagonal prism.
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Heptagonal is an adjective, not a noun! The answer will depend on whether you mean a heptagonal pyramid, a heptagonal bipyramid, a heptagonal prism or whatever.
50 stupid
A heptagonal prism has 7 lateral edges. This is because a heptagonal prism consists of two heptagonal bases connected by vertical edges, and each vertex of the heptagonal base corresponds to a lateral edge. Since a heptagon has 7 sides, there are 7 lateral edges in total.
Heptagonal prism.
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".
hexagonal 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?
Heptagonal prism
A heptagon is a 7-sided polygon, so a heptagonal prism is a 3D version of that (9 sides, 21 edges, 14 vertices).
there is 13 edges in a heptagonal pyramid.
a heptagonal pyramid has 8 faces
A heptagonal prism has two 7-sided bases.