A donut is shaped like a solid torus.
Understanding the Solid Torus Shape
A solid torus is a three-dimensional shape created by rotating a disk (a filled-in circle) around a line that does not intersect the disk. Think of it like taking a flat, round disc and spinning it around an axis, forming a ring-like solid object.
Characteristics of a Solid Torus
- It has a hole in the middle, making it ring-shaped.
- It is a three-dimensional solid, not a flat shape.
- The cross-section of a solid torus is a circle.
- The solid torus is distinct from a hollow torus, which is a surface without a "fill."
Common Objects with a Solid Torus Shape
Besides a donut, other familiar objects share the same solid torus shape:
- Bagels
- O-rings
- Some types of washers
In Summary
| Shape | Description | Examples |
|---|---|---|
| Solid Torus | A three-dimensional ring-shaped object formed by rotating a disk | Donut, Bagel, O-ring |
The donut's solid torus shape is a key feature of its design and is found in many other common objects as well.
