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         <description>Using GeoGebra: Polygons. Exploring Inputs and Dissappearing/Reappearing Objects. Comments and suggestions invited.</description>
         <pubDate>Fri, 03 Nov 2006 16:51:39 GMT</pubDate>
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Working with Sliders, Properties, Text
Comments and suggestions invited.</description>
         <pubDate>Fri, 03 Nov 2006 08:34:53 GMT</pubDate>
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         <description>Lesson 1 on using the freeware GeoGebra. Comments and suggestions invited.</description>
         <pubDate>Fri, 03 Nov 2006 08:21:02 GMT</pubDate>
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         <title>GeoGebra: Lesson 2</title>
         <description>Using GeoGebra: Right-triangle. Exploring horizontal, vertical and perpendicular lines, angles, labels with GeoGebra. Comments and suggestions invited.</description>
         <pubDate>Sat, 14 Oct 2006 20:38:08 GMT</pubDate>
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