Pi

Pi (π), mathematics ke ek constant hae, jon ki ek ghera (circle) ke circumference aur diameter ke ratio hae. Isse jon number nikle hae uu sab time ekke rahe hae, iske pi bola jjae hae aur iske value 3.141592653589793.... jon ki khalaas nai hoe hae. Ii rakam ke number ke irrational numbers bola jaae hae.

Ek circle ke circumference uske diameter se tiin se thorraa jaada guna hae. Iske sachchaa ratio ke "pi" bola jaae hae.

$\pi$ ke ek circle ke circumference $c$ aur iske diameter $d$ ke ratio define karaa jaae hae:

$\pi =\frac{c}{d}$