An octagonal prism.
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This would be a triangular prism.
* 27 edges: 9 on each end face and 9 other edges between the side faces. * 11 faces: two end faces and 9 side faces. * 18 vertices: 9 on each end face.
A square pyramid has 5 vertices and 8 edges. A square pyramid has a square for a base and four triangular faces that connect at the top. The top is one vertex. The four corners of the square base are the other four vertices. The square base has four edges. The other four edges extend from the vertex at the top to the vertices of the square base. This pyramid also has 5 faces.
No, a sphere is not a prism. A prism is a polyhedron with two parallel and congruent faces called bases, and all other faces are parallelograms. A sphere, on the other hand, is a three-dimensional geometric shape with all points on its surface equidistant from its center, with no faces, edges, or vertices. In essence, a sphere is a curved surface while a prism is a polyhedron with flat faces.
Oh, dude, a prism with 20 vertices has 10 faces. Each face of the prism connects two of the vertices, so you gotta divide the total number of vertices by 2 to get the number of faces. Math can be pretty chill when you break it down like that.