A dodecahedron has 20 sides, which are all pentagons. "Dodeca" means "do" (2) times "deca" (10).
A dodecahedron has 12 sides.
a Dodecahedron is a 3 diamentional shape having 12 plain faces in a regular solid figure with 12 equal pentagonal sides!
A dodecahedron's faces can be considered congruent of each other. Each face of the twelve-sided Platonic solid is a perfect pentacle, each angle at 72 degrees, each side equal with the others. All sides of the 12 pentacles join to form the dodecahedron. The sides and angles must remain equal, thus proving more than congruence in its form. As I write this, I'm looking at a dodecahedron on my desk. It is part of my dice set when I play Dungeons and Dragons.
I assume you mean a regular dodecahedron. A regular dodecahedron has twelve faces, each of which are regular* pentagons. *(all sides are congruent, all angles are congruent)
Dodecahedron
A dodecahedron is a 12 side polyhedron. A regular dodecahedron has regular pentagons (5 sides) for each face.
a 3-d dodecahedron has 12 pentagon shaped sides
it has 12
No.
All 12 sides are straight! This is a 2 dimensional object. * * * * * A dodecahedron is NOT a 2 dimensional object so the above answer is utter nonsense. A dodecahedron has pentagonal faces.
When you say "sides", do you mean faces or edges? A dodecahedron has 12 faces and 30 edges.