PI

PI (or Pi) is a mathematical constant that represents the ratio of a circle's circumference to its diameter. It is approximately equal to 3.14159, but it is an irrational number, meaning it cannot be expressed as a simple fraction and its decimal representation never ends or repeats.

History

The concept of PI has been known for nearly 4000 years. The ancient Egyptians and Babylonians had a rough understanding of the concept, and the Greek mathematician Archimedes is often credited with having made a more accurate calculation of PI.

Mathematical Properties

PI is a transcendental number, which means it is not the root of any non-zero polynomial equation with rational coefficients. It is also an irrational number, which means it cannot be expressed as a simple fraction and its decimal representation never ends or repeats.

Uses

PI is used in many areas of mathematics and science, including geometry, trigonometry, physics, and engineering. It is also used in statistics, where it appears in the formula for the normal distribution.

See Also

• Mathematics
• Geometry
• Trigonometry
• Physics
• Engineering
• Statistics

References

PI Resources
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