Ive used it to work out what diff and gear box ratios work best for doing an engine seap on a car. Need pi to find the wherl circumference to get the final speed etc
Also used it to work out capacity of a cylindrical fuel storage tank so can order the correct amount.
Same with ordering concrete to fill circular support piers.
I had to use it to figure out how much mulch to buy for this tree we planted and I was SO MAD because I had nagged my teachers for a reason why this was important to learn and it was just, “You might want to be an engineer.” “I won’t.” “You might.” “I won’t.”
Flash forward years later to me standing in the Lowes gardening center realizing I should have paid attention.
One time in getting my pilots licenses I panicked on a question. I couldn’t remember how they wanted me to solve it, but I needed to know distance of an arc. It’s basically just a section of a circle and I had the distance to the center so I figured it out pretty accurately.
Now computers do that though, so I guess it was only practical in the sense that I passed a test
Anytime you do any math involving circles you utilize Pi.
If you want to know how much pizza you have, you use Pi to figure that out. If you want to know how fast your bike wheel is spinning at a certain driving speed, you use Pi. If you want to determine how much fence you need to cover a circle of a certain size, you use Pi. Really, anytime you use math involving circles, you will utilize pi
A really important place that π just can’t help but appearing is signal processing.
Now, you don’t have to do it yourself, but all the mathematics needed for WiFi, digital music, GPS and so on rely on π.
This is because waves that last 2π per cycle have *extremely* useful properties, that make the maths so much easier.
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