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The transparent figure that Fra Luca Paccioli,in the HISTORY page, is studying is a composite of the platonic solids. The 5 Platonic solids are illustrated above with some of their properties. Euclid, 300 BCE and the Ancient Greeks, in their love for geometry, called these five solids, the atoms of the Universe.
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www.goldenmeangauge.co.uk/platonic.htm
www.goldenmeangauge.co.uk/platonic.htm
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Oct 27, 2009 ... The Platonic solids, also called the regular solids or regular polyhedra, .... the Ages: Highlights from the History of Regular Polyhedra. ...
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mathworld.wolfram.com/PlatonicSolid.html
mathworld.wolfram.com/PlatonicSolid.html
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Presumably this formed the basis of the constructions of the Platonic solids that constitute the concluding Book XIII of Euclid's Elements.
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www.mathpages.com/home/kmath096.htm
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And their search had a thrilling climax. After long and painstaking experiments, they discovered the five regular solids. These were remarkable and beautiful polyhedra, or shapes with many faces. ... bits of legend and history, for all the experiments were top secrets, of course.
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www.anselm.edu/homepage/dbanach/pyth2.htm
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The Greeks recognized that there are only five platonic solids. But why is this so? The key observation is that the interior angles of the polygons meeting at a vertex of a polyhedron add to less than 360 degrees.
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www.math.utah.edu/~alfeld/math/polyhedra/polyhedra.html
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he so-called Platonic Solids are regular polyhedra. “Polyhedra” is a Greek word meaning “many faces.” There are five of these, and they are characterized by the fact that each face is a regular polygon, that is, a straight-sided figure with equal sides and equal angles:
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www.mathacademy.com/pr/prime/articles/platsol/index.asp
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The five Platonic Solids have been known to us for thousands of years. These five special polyhedra are the tetrahedron, the cube, the octahedron, the icosahedron, and the dodecahedron. ... Up: Polyhedra History Articles...
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www.geom.uiuc.edu/~sudzi/polyhedra/platonic.html
www.geom.uiuc.edu/~sudzi/polyhedra/platonic.html
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It is important to understand the History behind the Platonic Solids. The following websites will talk about the history behind the Platonic Solids. Visit each website to complete Assignment 2: History Essay...
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www.eagleti.com/SchoolETI/Platonic%20Solids/Instruction...
www.eagleti.com/SchoolETI/Platonic%20Solids/Instructional%20Website/02-insweb-history.htm
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Platonic solid - Wikipedia, the free encyclopedia
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In geometry, a Platonic solid is a convex polyhedron that is regular, in the sense of a regular polygon. Specifically, the faces of a Platonic solid are congruent regular polygons, with the same num...
en.wikipedia.org/wiki/Platonic_solid
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