Pi (nonfiction)

The circumference of a circle is slightly more than three times as long as its diameter. The exact ratio is called π.

The number pi is a mathematical constant, the ratio of a circle's circumference to its diameter, commonly approximated as 3.14159.

mathematical constant

Nonfiction cross-reference

• Geometry (nonfiction)
• Mathematics (nonfiction)

External links

• [ Pi] @ Wikipedia