3 dimensional is a cube. it has 8 edges
The regular dodecahedron is the 3-dimensional analog of a regular pentagon. In other words, it is a three-dimensional pentagon.
There are infinitely many 3-dimensional shapes with a pentagon as its base.
A 3-D pentagon
Assuming you mean a pentagon - not penagon, a 3-dimensional pentagon is a dodecahedron which has 12 faces.
There is no 3 dimensional figure with JUST 3 edges.
3 corners (vertices) and 3 edges (sides).
The 3D shape formed by regular pentagons is a dodecahedron, which has 30 edges.