This is a tool that calculates the volume, apex height or base area of a pyramid.

The tool is multi-directional and, therefore, determines the information that needs to be calculated based on which data has been entered. In other words, if two out of the base area, apex height or volume are entered, the tool calculates the remaining one. When further data changes are made, the tool re-calculates the same pyramid property unless that property is itself changed or a different data field is cleared.

Associated tool link: http://www.coggit.com/tools/dimensions_of_a_pyramid.html