Pi is a number represented using this symbol (π). It is a number that effectively goes on forever, and more digits of Pi are being calculated all the time.
What number does Pi represent?
Rounded to 3 decimal places, the number pi represents is 3.141… However, the number goes on forever, so we simply use the symbol π to represent it to save time.
How can Pi be used?
Pi can be used for many things, mostly in maths and science, including working out the area of a circle.