Nope, you could not use polarized sunglasses to watch 3D movies. Because polarized sunglasses are designed to reduce the glare from bright surface, like water, snow. They are highly useful for sports, driving to see more clearly to aviod potential danger. There is no any glare when you are watching 3D movie in a dark room. Hence, you could not see any 3D image from your sunglasses. However, some 3D movies also utilize polarizing glasses. Usually one lens is horizontally polarized and the other one is vertically polarized, so that each eye sees a slightly different version of the movie screen.
