Surface Area Growing Post

Rectangular Prism

Formula:
A = lxw

Triangular Prism

Formula:
A = lxw
A = bxh/2

Cylinder:

Formula:
r = d/2
SA = 2x(πxr²)+(πxdxh)

Sorry, the videos wont upload.. So, here are the links:

Cylinder - http://www.ustream.tv/recorded/5160205
Rectangular Prism - http://www.ustream.tv/recorded/5160282
Triangular Prism - http://www.ustream.tv/recorded/5160248