Pyramids - Geometry for Kids - How many sides does a pyramid have?



A pyramid is a three-dimensional solid form made out of triangles, and sometimes a square. There are two common kinds of pyramids: the ones that are made by fitting four triangles together, and the ones that are made by fitting four triangles together on a square base, like the one in the picture here. The pyramids of Egypt are the kind with a square base. You can also have pyramids with hexagonal or octagonal bases, or however many sides you like. If the base is a circle, then the resulting solid shape is a cone.

To calculate the surface area of a pyramid, you need to calculate the area of each of the triangles (or the triangles and the square) involved and then add them together.

To calculate the volume of a pyramid, first calculate the volume of the rectangular solid around the pyramid. That's the area of the base multiplied by the height of the pyramid. Then divide that by three, because the pyramid doesn't fill up the whole volume of the rectangular solid around it.

Main Geometry page

To find out more about geometry, check out these books from or from your library:

Science for Kids home page
History for Kids home page

Copyright 2012-2014 Karen Carr, Portland State University. This page last updated 2014. Powered by Dewahost.
About - Contact - Privacy Policy - What do the broom and the mop say when you open the closet door?