An edge of a 3-d pentagon is the intersection of two of its adjacent faces.
a 3D pentagon
The vertex of a 3D pentagon is 10. :)
A 3D name for a pentagon is a pentagonal prism.
No, a pentagon is 2-D.
3D pentagonal prismPRISM
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A 3D pentagon could be called a pentagon prism or a dodecahedron which is a Platonic solid with 12 pentagonal faces.
A hexahedron.
pentagonal prism
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Pentagon (and in 3d: triangular prism and tetrahedron.)