A dodecagon is a plane shape and so has only one face. It has 12 sides and 12 vertices.
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10 * * * * * Polyhedra are named according to the number of faces that they have. So a 3d dodecagon, called a dodecahedron would have 12 faces.
dodecagon- 12 sides
There is no 3D dodecagon. A dodecahedron is a 3D shape with 12 polygonal faces. There are 6,384,634 topologically distinct convex dodecahedra. The best known is made up of 12 regular pentagons.
A 12 sided figure is called a dodecagon. A 3-dimensional shape with 12 faces is called a dodecahedron.
A dodecagon has 12 sides.