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Surface Area Of Torus

A ring-shaped surface generated by rotating a circle around an axis that does not intersect the circle is called a surface area of torus.

In geometry, a torus is a surface of revolution generated by revolving a circle in three-dimensional space about an axis coplanar with the circle. If the axis of revolution does not touch the circle, the surface has a ring shape and is called a ring torus or simply torus if the ring shape is implicit.

4Π 2rt

r = tube radius, t = torus radius

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