# annulus

An annulus is a two-dimensional shape which can be thought of as a disc with a smaller disc removed from its center. An annulus looks like:

Note that both the inner and outer radii may take on any values, so long as the outer radius is larger than the inner.

Title annulus Annulus 2013-03-22 12:26:23 2013-03-22 12:26:23 akrowne (2) akrowne (2) 12 akrowne (2) Definition msc 51-00