Notice these interesting things:
- It can be made by revolving a
small circle along a line made
by a bigger circle.
- It has no edges or vertices
- It is not a polyhedron
Torus in the Sky.
The Torus is such a beautiful solid,
this one would be fun at the beach !
Volume and Surface Area
Surface Area = 4 × π2 × R × r
Volume = 2 × π2 × R × r2
Note: Area and volume formulas only work when the torus has a hole!
And did you know that Torus was the Latin word for a cushion?
(This is not a real roman cushion, just an illustration I made)
When we have more than one torus they are called tori
More Torus ImagesAs the small radius (r) gets larger and larger, the torus goes from looking like a Tire to a Donut: