Question

Help me with an assignment?
Okay so I have to sketch a net to a polyhedron
Then I have to label it's Faces, Vertices and Edges
After that I have to describe the relationship to a two dimensional base polygon

Then I have to do it again with a new polyhedron and then use the Eulers formula
Then answer these questions:
Did the Eulers formula work?
What relationship did you find between your two polyhedra?

So to start off.....What is a polyhedron..?