Donut-shaped elastic torus and its cross-section.

Current – Intro to Physics for Non-Majors

What is the geometric shape that describes a bagel or donut? - Quora

Torus - Wikipedia

Torus - Wikipedia

What is a torus field? - Quora

Cylindrical shells to find volume of a torus

Donut-shaped elastic torus and its cross-section.

Torus - Wikipedia

Torus - Wikipedia

A solid torus and its toroidal coordinates in the undeformed configuration