Reckoning / Shape / Hollow cylinder (tube)
Solid · Round solids
Hollow cylinder (tube)
A cylinder with a coaxial cylinder removed, like a pipe.
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Dimensions
Results
volume V
Formulas
An annulus times its height.
Checked: the V formula agrees with a Monte Carlo measurement of the shape itself, made from its geometric definition, every time the site is built.
Topology lens
A solid with one hole through it, like a ring or a pipe. Its surface is a torus: Euler characteristic 0, genus 1. No stretching makes it a ball. More on the lens.