(2)surface+area+of+a+regular+pyramid.

Vocabulary
__Pyramid__- a polyhedron in which all but one of the polygonal faces intersect at a single point known as the vertex of the pyramid __Base__- The polygonal faces of a prism or pyramid that are not bases __Lateral face__- the faces of a prism or pyramid that are not bases __Vertex of the Pyramid__- lateral faces are triangles that share a single vertex __Base Edge__- lateral face has one edge in common with the base __Lateral Edge__- intersection of two lateral faces __Altitude__- is the perpendicular segment from the vertex to the plane of the base __Height__- of a pyramid is the length of its altitude __Regular Pyramid__- A pyramid whose base is a regular polygon and whose lateral faces are congruent isosceles triangles. __Slant Height__- the length of an altitude of a lateral face of a regular pyramid

Surface Area of a Regular Pyramid
S=L+B or S=1/2lp+B

Surface Area of Pyramid
S=1/2lp