Geometry
posted by Jose on .
Can someone please kind enough to explain this questions for me. Thank you
What are some examples of other important polyhedra?
What characteristics help you determine whether a polyhedron is regular or irregular?
How can you check for symmetry and rotational symmetry of polyhedra?

You will find good reading in the following article which also answers most of your questions.
http://en.wikipedia.org/wiki/Polyhedron 
Thank you MathMate!!! I did some research but I just did not find what I was looking for.