A directory of useful objects found on the web for teaching Maths.
Video, YouTube, Visualization
Visualisation of conic sections made by shining light on a sphere - and the associated sphere which would make up a Dandelin pair.
12 January 2013 Edit: 23 February 2014
User submitted, thanks to Nordin Zuber
Submit a correction to this link | Help align this link to NSW Mathematics Syllabuses align this link to The Australian Curriculum
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