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 | Spherical Earth | Spherical coordinate system | spherical aberration | Princeton Triangle Club | Mara Triangle | Love triangle | Ilemi Triangle | Bermuda Triangle (album) | Battle of Triangle Hill | Triangle wave | Triangle Transit | Triangle Island | The Incomplete Triangle | Sierpinski triangle | Platinum Triangle | Plancherel theorem for spherical functions | pink triangle |
In 1646 John Wallis received from Foster a theorem on spherical triangles which he afterwards published in his Mechanica.