👉 Pi, often denoted as π, is a mathematical constant representing the ratio of a circle's circumference to its diameter. This fundamental ratio, approximately 3.14159 but infinitely complex and non-repeating, underpins much of geometry and trigonometry. Pi is not just a number; it's a universal constant that describes the geometry of circles and spheres across all dimensions. In mathematics, pi appears in various formulas, from basic circle area and circumference (A = πd or C = 2πr) to more advanced calculus problems involving integrals and limits. Its irrationality means it cannot be expressed as a simple fraction, and its transcendental nature implies it's not the root of any polynomial equation with rational coefficients. Pi's ubiquity in nature, from the spiral of a nautilus shell to the orbits of planets, makes it a cornerstone of both theoretical and applied mathematics.
