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A pyramid seems to fit the description.
The vertex is a point of polygon or polyhedra that is formed by 2 lines or 3 edges on a polyhedron.
A tetrahedron (4 faces) or triangular bipyramid (5 faces).
A line that joins any vertex of a polygon (or polyhedron) to any vertex other than itself or adjacent ones is a diagonal.
pyramid
A pyramid fits the given description
pyramid An pyramid is a geometric solid of the shape made famous by the royal tombs of ancient Egypt. It is a solid whose base is a polygon and whose lateral faces are triangles with a common vertex
A pyramid seems to fit the description.
The vertex is a point of polygon or polyhedra that is formed by 2 lines or 3 edges on a polyhedron.
A pyramid has a polygonal base with all other sides being triangles. As the Egyptians famously demonstrated, a common pyramid has a square base with four triangles meeting at a vertex, but any polygon - regular or irregular - can be used as the base of such a polyhedron.
A tetrahedron is a geometric solid with four triangular faces, six edges, and four vertices. It is a type of polyhedron with triangular faces meeting at each vertex.
A polyhedron of which one face is a polygon of any number of sides, and the other faces are triangles with a common vertex.
A tetrahedron (4 faces) or triangular bipyramid (5 faces).
A line that joins any vertex of a polygon (or polyhedron) to any vertex other than itself or adjacent ones is a diagonal.
pyramid
pyramid
pyramid