Pi

'Pi, 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.