Definition

A shape that is part of a solid, like a cone or pyramid, created by cutting the solid with two parallel planes, especially the section between the base and a parallel plane above it.

Example

The frustum of the cone was used to create a unique vase design.

Conversation

Have you ever heard of a frustum in geometry?

Yeah, I learned about it in math class last year.

It's interesting how a frustum is formed by cutting a cone, right?

Exactly! It's such a unique shape and has practical uses too.

Synonyms & Antonyms

Root Explanation

Frustum comes from the Latin word 'frustum' (meaning a piece or a fragment). It refers to a portion of a solid, typically a cone or pyramid, that is cut off by a plane parallel to its base.

Memory Tip

Think of a 'piece' or 'fragment' from a solid shape — that's what a frustum represents.

Visually Confused Words