Drawing and Naming Perpendicular Lines (using a triangle and ruler)
How do you draw perpendicular lines and perpendicular line segments on paper? What is the symbol for "is perpendicular to"? What is the symbol for "is not perpendicular to"? Find the answers in this video.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/ .