noun
- the portion of a cone or pyramid that remains after the top is cut off by a plane parallel to the base
Usage: geometry
Examples
- The lampshade was shaped like a frustum of a cone.
- To calculate the volume of a frustum, you need the areas of both bases and the height.
- The ancient pyramid appeared to be a frustum due to erosion at its peak.
- The bucket had the form of a frustum with a wider opening at the top.
- In geometry class, we learned to find the surface area of a frustum.
- The truncated cone created a perfect frustum for the architectural design.