Pi - Wikipedia, the free encyclopedia
1 Fundamentals 1.1 Name 1.2 Definition 1.3 Properties 1.4 Continued fractions 1.5 Approximate value 2 History 2.1 Antiquity 2.2 Polygon approximation era 2.3 Infinite series 2.3.1 Rate of convergence 2.4 Irrationality and transcendence 2.5 Adoption of the...