A dodecahedron can have 8 to 20 vertices.
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There are at least three faces at a vertex of a dodecahedron, and at most eleven.
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A dodecahedron pyramid does not exist.However, a dodecagon pyramid exists. If a dodecagon has 12 sides, there would be 12 vertices. But all the vertices would join up to make a vertex, making one extra vertex. 12 + 1 = 13
A dodecahedron has 0 parallel faces
A dodecahedron need not have any triangular faces.