2
$\begingroup$

Is there a proper name for a shape defined by the volume between two concentric spheres? My understanding is that, formally, a "sphere" is strictly a 2D surface and there's a formal term for volume contained by that surface -- which I forget.

Is there a term that describes the volume between two concentric spheres? That is, colloquially, a "a filled in sphere with a hollow core".

Another phrasing would be, what is the name for a three dimensional annulus? (Or is an annulus not strictly two dimensional?)

$\endgroup$
5
$\begingroup$

It's called a "spherical shell".

$\endgroup$
0
$\begingroup$

It's also called an annulus. ${}$

$\endgroup$

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.