Help us caption and translate this video on Amara.org: http://www.amara.org/en/v/B2vp/ Esercizi: http://www.khanacademy.org/exercise/angles_1 Traduzione in Italiano del video Angles of parallel lines 2 http://www.youtube.com/watch?feature=player_embedded&v=0eDwckZOffc http://www.khanacademy.org/video/angles-of-parallel-lines-2?playlist=Geometry Help us caption & translate this video! http://amara.org/v/B2vp/