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Drawing Perpendicular Lines in GeoGebra
In this video you can see how to draw perpendicular lines and perpendicular line segments in GeoGebra (GGB) and how to write that they are perpendicular.Video without words.Thanks to Rex Boggs, Rockhampton Grammar School, Australia (http://bit.ly/rexboggs ) for help with the English translation.Music by longzijun, http://longzijun.wordpress.com/ .My math materials in English: http://www.antonija-horvatek.from.hr/... .My (whole) website: http://www.antonija-horvatek.from.hr/ .
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