Pi
The mathematical constant ? is the ratio of a circle's circumference (Greek ??????????, periphery) to its diameter and is commonly used in mathematics, physics, and engineering. The name of the Greek letter ? is pi (pronounced pie), and this spelling can be used in typographical contexts where the Greek letter is not available. ? is also known as Archimedes' constant (not to be confused with Archimedes' number) and Ludolph's number.
Related articles
- List of topics related to pi
- Greek letter pi
- Calculus
- Geometry
- Trigonometric function
- Pi through experiment
- Proof that π is transcendental
- A simple proof that 22/7 exceeds π
- Feynman point
- Pi Day
- Lucy Tuning
~ Table of Content ~
| ► | Introduction |
| ► | Properties |
| ► | Formulae involving π |
| ► | History of π |
| ► | Numerical approximations of π |
| ► | Open questions |
| ► | The nature of π |
| ► | Fictional references |
| ► | π culture |
| ► | Related articles |
| ► | References |
| ► | External links |
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