“In geometry, an icosahedron (Greek: eikosaedron, from eikosi twenty+ hedron seat... Icosahedron Ellipsoid “The history of logic is the study of the development of the science of valid inference (logic... History of logic “A sphere (from Greek σφαίρα — sphaira, "globe, ball,") is perfectly round geometrical object in... Sphere “Determining the length of an irregular arc segment—also called rectification of a curve—was... Arc length “A hexagonal bipyramid is a polyhedron formed from two hexagonal pyramids joined at their bases... Hexagonal bipyramid “Stefan Banach ( [,stɛfan'banax] (help·info); 1892-1945) was an eminent Polish mathematician and... Stefan Banach “In mathematics, a polygonal number is a number represented as dots or pebbles arrayed in the... Polygonal number Pages in category "Pages with broken file links" The following 13 pages are in this category, out of 13 total. A Template:Ambox/small Arc lengthB Stefan BanachE EllipsoidH Hexagonal bipyramid H cont. History of logicI IcosahedronP Polyform Polygonal numberS Sphere T Template:Talkback/manual editintro Template:Talkback/undo editintroV Venn diagram Categories: Hidden categories