1973/12/01 by DEREK G. BALL · 2 citations
Mathematics · #Mathematics and Applications #Circumference #Perimeter #Mathematics #Diameter ratio #Value (mathematics) #Aspect ratio (aeronautics) #Geometry #Combinatorics #Statistics #Physics #Mechanics
paper · doi:10.2307/3616052
openalex publication_date 1973/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/05/21
The number π signifies the ratio of circumference to diameter of a circle, and the definition depends upon the fact that the value of this ratio is independent of the size of the circle. We can determine a similar ratio for any shape by replacing circumference by perimeter and diameter by width.