Person — Euclide. Featured in chapters 01 · 08 · 15 Linked atoms 6 linked atoms. 01 Numeri e operazioni fondamentali How many prime numbers are there Why the FTA is fundamental 08 Fondamenti di geometria euclidea Euclid and the Elements 15 Similitudine Euclid’s first theorem Euclid’s second theorem Proof of Euclid’s theorems