Bermuda Triangle | Research Triangle Park | Research Triangle | Encyclopedia of Triangle Centers | Sunni Triangle | Pascal's triangle | love triangle | Iron Triangle | Bizarre Love Triangle | Virginia Triangle | Triangle of U | Triangle Fraternity | Triangle Film Corporation | Princeton Triangle Club | Mara Triangle | Love triangle | Inequality of bargaining power | Ilemi Triangle | gender inequality | Bermuda Triangle (album) | Battle of Triangle Hill | Wirtinger's inequality | Triangle wave | Triangle Transit | Triangle Island | The Incomplete Triangle | Steffensen's inequality | Sierpinski triangle | Samuelson's inequality | Platinum Triangle |
Distance measures can be classified into Euclidean measures and non-Euclidean measures depending on whether the triangle inequality holds.
"A Two-Triangle Inequality", Daniel Pedoe, The American Mathematical Monthly, volume 70, number 9, page 1012, November, 1963.