: Mathématiques: torus

geometry > geometric figure > solid of revolution > torus

torus

In geometry, a torus (PL: tori or toruses) is a surface of revolution generated by revolving a circle in three-dimensional space one full revolution about an axis that is coplanar with the circle. The main types of toruses include ring toruses, horn toruses, and spindle toruses. A ring torus is sometimes colloquially referred to as a donut or doughnut.
(Wikipedia, The Free Encyclopedia, https://en.wikipedia.org/wiki/Torus)

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