The solid at right is an example of a truncated pyramid. It is formed by slicing and removing the top of a pyramid so that the slice is parallel to the base of the pyramid. If the original height of the square-based pyramid at right was
Find the volume of the large pyramid.
The side of the small pyramid is
So, the lsf is
Find the volume of the small pyramid.
Subtract the volume of the smaller pyramid from the volume of the larger pyramid.