When we think of pyramids we think of the [b]Great Pyramids of Egypt[/b].[br]They are actually [i][b]Square Pyramids[/b][/i], because their base is a Square.[br][br][img]http://www.mathsisfun.com/geometry/images/pyramids.jpg[/img][br][img width=220,height=148]http://www.mathsisfun.com/geometry/images/pyramid-outlined.jpg[/img] [br][br][br][b][u][size=200]Parts of a Pyramid[/size][/u][/b][br][br][img]http://www.mathsisfun.com/geometry/images/pyramid-defined.svg[/img] [br][br]A pyramid is made by connecting a [b]base[/b] to an [b]apex[/b][br]The base is a polygon (flat with straight edges) and all other faces are triangles. No curves![br][br][br][b][u][size=200]Types of Pyramids[br][/size][/u][/b][br]There are many types of Pyramids, and [u]they are named after the shape of their base[/u].[br]- Triangular Pyramid[br]-Square Pyramid[br]-Pentagonal Pyramid[b][i][br]... and so on ...[br][br][br][br][/i][/b][b][u][size=200]Surface Area and Volume[/size][/u][/b][br][br][img]http://www.mathsisfun.com/geometry/images/pyramid-height-perimeter.svg[/img][br][u]The Volume of a Pyramid[/u] [br] [br][b]Volume = [sup]1[/sup]/[sub]3[/sub] × [Base Area] × Height[/b] [br][br][b][u]The Surface Area of a Pyramid[br][br][/u][/b] [b]Surface Area = [Base Area] + [sup]1[/sup]/[sub]2[/sub] × Perimeter × [Slant Length][/b][br][br]