Help us caption and translate this video on Amara.org: http://www.amara.org/en/v/B2vn/ Esercizi: http://www.khanacademy.org/exercise/angles_1 Traduzione in Italiano del video Angles (part 3) http://www.youtube.com/watch?feature=player_embedded&v=NLg6hfoKKlE http://www.khanacademy.org/video/angles--part-3?playlist=Geometry