LEONARDO DA VINCI 1452-1519

Leonardo da VINCI Vinci, 1452–Amboise, 1519 Compasses, Various Devices and Considerations Red chalk About 1493–1494 Institut de France, Paris, Manuscript H, fol.108v–109r Leonardo da VINCI Vinci, 1452–Amboise, 1519 The Euclidean Proof of the Pythagorean Theorem Pen and brown ink About 1503–1507 This figure from Manuscript K corresponds to Euclid’s demonstration, in Proposition 47 of his first book of the Elements, of the most famous theorem of all – that of Pythagoras – according to which, in a right-angled triangle, the square on the side opposite the right angle is equal to the sum of the squares on the other two sides: BC 2  = AB 2 + AC 2 . Institut de France, Paris, Manuscript K, fol. 14v–15r 116 117