This french mathematician penned the Elements DE Geometrie in 1794 In which he clarified much of Euclid's work. One of its highlight is the proof of the irrationality of pi. This book became the textb?

The French mathematician who authored "Elements de Géométrie" in 1794 is Adrien-Marie Legendre. In this work, he provided clarifications and simplifications of Euclid's geometry, along with significant results, including the proof of the irrationality of pi. "Elements de Géométrie" became a standard textbook in geometry and influenced mathematical education for many years.