Torus

The word “torus” is derived from the Latin word “torus,” which means “a swelling” or “a bulge.” The “torus” holds significance across various fields, including ancient technologies, mathematics, physics, and even art.
A torus is characterized by its central void, which differentiates it from other geometric shapes. The distance from the center of the hole to the center of the torus is known as the “major radius,” while the radius of the tube itself is called the “minor radius.”
A torus exhibits rotational symmetry around its central axis. This symmetry means that if the torus is rotated about this axis, it retains its shape and dimensions. This property makes the torus a common subject in studies of symmetry in mathematics and physics.