The following terms may be new for this lesson:
pyramid - a polyhedron (many sided solid) in which the base is a polygon and the lateral faces (sides) are triangles with a common vertex
cone - has a circular base and a vertex that is not in the same plane as the base
Net - a two-dimensional representation of the faces of a solid (think of cutting it open and unfolding the sides)
Slant height - the altitude of any lateral face of a pyramid (or distance up the side of a right cone)
Source: Geometry; McDougal Littell (2004) by Larson, Boswell, and Stiff
Now we will turn our attention to cones.