No, a dodecahedron is a 3-dimensional shape. Some of the 6.4 million topologically distinct dodecahedra have only triangulat faces, there are many more in which some faces, but not all, are triangular.
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A regular dodecahedron does not but it is possible to have a dodecahedron with some triangular faces.
A regular tetrahedron. octahedron, dodecahedron.
A dodecahedron need not have any triangular faces.
No, the faces of a regular dodecahedron are pentagonal.No, the faces of a regular dodecahedron are pentagonal.No, the faces of a regular dodecahedron are pentagonal.No, the faces of a regular dodecahedron are pentagonal.
A cube and a dodecahedron.