Ruimtemeetkunde

A ride through the polyhedra world
"Geometry is a skill of the eyes and the hands as well as of the mind. "
(J.Pederson)
 
Applet map projections
This applet demonstrates different map projections. They can be scaled to different sizes, or deliberately or randomly rotated. Experiment using the mouse.
 
Dodecahedron Measures
I recently saw a newsgroup post from someone asking for the formulas of the surface area and volume for each of the five Platonic solids, given the side length. Having a little free time, I decided to work out one of the more difficult ones, the volume of a dodecahedron.
 
Geocadabra
Geocadabra is een wiskunde programma voor het gehele onderwijs: Dynamische vlakke meetkunde, Dynamische ruimtemeetkunde, Perspectief tekenen, Statistiek en kansrekening, Analyse van functies en krommen, 2e fase applicaties...
 
Online column van Bruno Ernst Online column van Bruno Ernst
Vanaf januari 2002 verschijnt op Ars et Mathesis (zie boven) ongeveer maandelijks een column van Bruno Ernst.
Op de pagina staan links naar de pagina's met de verschenen afleveringen (en om de bezoeker te laten terugkomen: de titels van de toekomstige).
 
Paper Models of Polyhedra Paper Models of Polyhedra
Polyhedra are beautiful 3-D geometrical figures that have fascinated philosophers, mathematicians and artists for millennia. On this site are more than eighty paper models available for free.
 
Polyhedra Polyhedra
Archimedean Solids, Cubes, Dual Polyhedra, Hyperbolic Polyhedra, Johnson Solids, Kepler-Poinsot Solids, Miscellaneous Polyhedra, Parallelepipeds, Platonic Solids, Polyhedron Compounds, Polyhedron Operations, Polyhedron Properties, Prisms, Pyramids, Stellation, Tetrahedra, Uniform Polyhedra, Zonohedra.
 
Polyhedra V1.0
This applet allows you to visualize the five regular polyhedra and their inclusions. The applet is customizable. It may be used to show a particular inclusion as in the previous image, but also to build interactively new inclusions.
 
Spherical Geometry
Whereas basic plane geometry is concerned with points and lines and their interactions, most of the early geometry of the Babylonians, Arabs, and Greeks was spherical geometry--the study of the Earth, idealized as a sphere. This early science was astronomy and the need to measure time accurately by the sun.
 
The Geometry of the Sphere
The material on these pages was the text for part of the Advanced Mathematics course in the High School Teachers Program at the IAS/Park City Mathematics Institute at the Institute for Advanced Study during July of 1996.
 
Van foto's tot 3-dimensionale modellen
Computermodellen van bestaande 3-dimensionale omgevingen worden steeds belangrijker voor de besluitvorming in alle maatschappelijke domeinen: ruimtelijke ordening en architectuur, telecommunicatie, chirurgische planning, forensische wetenschap, archeologie, film-animatie, spelindustrie, internet, enz.
 

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