“In geometry, an icosahedron (Greek: eikosaedron , from eikosi twenty + hedron seat; ... Icosahedron Ellipsoid “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 “The history of logic is the study of the development of the science of valid inference (logic... History of logic “File:Samplevenndiagram.jpg A Venn diagram, named after the British mathematician and philosopher... Venn diagram “In mathematics, a polygonal number is a number represented as dots or pebbles arrayed in the... Polygonal number “Stefan Banach ( [,stɛfan 'banax] (help ·info ) ; 1892-1945) was an eminent Polish... Stefan Banach 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 Polygonal numberS SphereT Template:Talkback/manual editintro T cont. Template:Talkback/undo editintroV Venn diagramY User:Yesterday once more Categories: Hidden categories