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The Virtual Textbook
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These resources have been reviewed and selected by STEM Learning’s team of education specialists for factual accuracy and relevance to teaching STEM subjects in UK schools.
Ellipse
This program deals with various aspects of the coordinate geometry of an ellipse. The first two sheets show the connection between ellipse and the auxiliary circle and also the focus/directrix definition of the ellipse. Subsequent sheets trace an interesting loci derived from tangents and normals. Parameters can be altered on each of the sheets and the appropriate ellipses, lines and loci shown.
Note: This program was designed by be viewed on a screen with a resolution of 1024 x 768. Users may have to adjust the resolution of their screen for the pages to display as was originally intended. The program uses macros which need to be enabled on users’ machine.
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