Pi is used in navigation. When a plane flies over a distance it does not fly in a straight line, it flies in an "arc length". It is also used in statistics with the different types of graphs "bell curves". Also, with the signal transmission, like: Radio waves, designing microwaves, ect. It also helps calculate things in advanced physics, like the universes expansion. "M" theory uses it quite a bit. Is the membrane that is our universe a wave? Possibly and the dark energy might be nothing more than our section of universe approaching an wave arch's max.; thus giving the illusion of expansion at a exponential rate.

Just about the same things. Finding out what people do

Exact value of pi

Dress making, bike making, car making, cake/ pie/ pizza making and sprinkler designing

It's the ratio of the circumference of any circle to the diameter of that circle

or

if no matter if you make a bigger circle the ratio will be 3.141592653589793238 (pi)

or

if no matter if you make a bigger circle the ratio will be 3.141592653589793238 (pi)

You can use pi in many ways. To find the 3D area of a space, for example. So to speak, not uses of using pi, but ways of using it.

Thank you for your interest in pi!!! Keep learning!

Thank you for your interest in pi!!! Keep learning!