A triangular dipyramid (two tetrahedrons or triangular pyramids stuck together) has 9 edges and 5 vertices.
A parallelepiped (including cuboid) has 12 edges and 8 vertices
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A vertex is the point where three or more edges of a solid figure meet.
vertex/vertices
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True. A cube has 12 edges and 8 vertices.
Edges join two vertices. Three or more edges meet at a vertex (it could be two if not in a polyhedron).