A frustum (unfortunately commonly misspelled "frustrum") is that portion of a solid which lies between two parallel planes cutting the solid. Degenerate cases are obtained for finite solids by cutting with a single plane only.

# Frustum

## See also

Conical Frustum, Pyramidal Frustum, Spherical Segment## Explore with Wolfram|Alpha

## Cite this as:

Weisstein, Eric W. "Frustum." From *MathWorld*--A Wolfram Web Resource. https://mathworld.wolfram.com/Frustum.html