Help us caption and translate this video on Amara.org: http://www.amara.org/en/v/B2vr/ Traduzione in Italiano del video Similar triangles http://www.youtube.com/watch?feature=player_embedded&v=BI-rtfZVXy0 http://www.khanacademy.org/video/similar-triangles?playlist=Geometry Help us caption & translate this video! http://amara.org/v/B2vr/