naar: MathsNet Interactive Geometry: Platonic solids en kijk ook eens wat er nog meer te ontdekken valt op de siteTransformations : a collection of resources
Euclid's elements: the 48 propositions from Book 1
sacred geometry: philosophy and practice
The hidden world of triangles and circles
Circle only constructions: no rulers allowed
An exploration into two circles: geometry & imaginary numbers
Pythagoras' theorem: proofs and problems
Is this a square?: how to decide
The egg project: how to construct Euclidian eggs
Circle theorems: six properties
Geometry in 3 dimensions: solid shapes
Feynman's lost lecture: motion of planets around the sun
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