Anyone have the intuition about why projection and least squares arrive at the same solution? My only piece of intuition is the notion of "length" is kind of "squared"####[['notion of "length"', 'Mathematical_Related_Concept', 'NEU'], ['projection', 'Mathematical_Related_Concept', 'NEU'], ['least squares', 'Mathematical_Related_Concept', 'NEU'], ['"squared"', 'Mathematical_Related_Concept', 'NEU']]