(a dodecahedron is a 12 faced shape with each face having 5 sides)
No cheating (you can look up the angles with google) this needs to be constructed.
That's what I mean about software being too easy to make models these days. Using a program like Inventor that's parametric, one would only have to draw the pentagon, extrude it at a draft angle of 5-20 degrees or so to make it look right to get the point, then, in an assembly insert that object 20 times, attach them by edge until you have completed the dodecahedron, make all angles equal, and bam... there it is.
In Autocad there'd be a few more steps... but not really... not with the align command and such.