1. Exploring Solids Starter In your own words, what is a polygon? A simple closed figure in a plane formed by three or more line segments March 23, 2010

2. What is a Polyhedron? A polyhedron is a solid with flat faces that are polygons. vertex edge face

3. Prefixes Tri – 3 Tetra – 4 Penta – 5 Hexa -6 Hepta - 7 Octa – 8 Non – 9 Deca – 10 Hendeca – 11 Dodeca - 12

4. Examples

5. Euler’s Formula E + 2 = V + F Picture from http://en.wikipedia.org/wiki/Leonhard_Euler