7.3


 * Surface Area and Volume of Pyramids

Pyramid:** a solid having a polygonal base, and tirangular sides that meet in a point. [|math for pyramids]


 * Lateral face:** the triangle that makes base of a pyramid


 * Lateral edge:** The point where to lateral faces come together


 * Vertex of a pyramid:** The point of a pyramid where all sides of the triangles come together at the top


 * Base edge:** A side of the pyramid


 * Regular pyramid:** A pyramid whose base is a regular polygon and whose lateral faces are identical isoscolese triangles


 * Slant height:** The rate at which the side of the pyramid goes from the base to the vertex[[image:giza.jpg link="http://www.jmundyphotography.com/egypt/images/Giza%20Great%20pyramid.jpg"]]

Slant height is 186.369m


 * Surface area of a regular pyramid:** S = L + B


 * Volume of a pyramid:** V = 1/3 Bh

S= 3+5 = 8

V= 1/3 (12) (21) = 84