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# Why did they need pi?

Updated: 12/19/2022

Wiki User

15y ago

It is the ratio between a circumference of a circle and the diameter (they needed a number to describe this).

Wiki User

15y ago

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Q: Why did they need pi?
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### Why do you need to know pi?

You should know pi because of math. You need pi when you are dealing with circles. The only thing you really need to know about pi is 3.14 though.

### Do you need Pi?

Everyone needs Pi.

### Do not have a question, more of a statement. I want to get into the business of private investigation.?

If you are wanting to become a PI you will need to obtain a PI license. To do that you will need to have a licensed PI sponsor you and then take your PI test. If you pass that, you will get your license. Good Luck.

### How many decimals of pi need?

You only need one decimal in pi (3.14). Pie goes on forever, if that's what you're asking.

### How can you use pi?

You need Pi to find the radius or circumference of a circle and there are many more uses!

### If the radius equals 2cm what is the circumference?

C = 2 * (pi) * (radius) So plug in 2 for radius C = 2 * (pi) * (2) C= 4(pi) If you need to approximate multiply 4 times 3.14. If you do not need to approximate then your answer is 4(pi)

### What is the circumference of a circle with a diameter of 1 inch?

You need the formula circumference = pi x diameter pi = 3.14.. This is by the way the definition of the special number pi.

### What is the pi conversion?

Pi has over two billion digits but you can use 3.14 or if you need a fraction 22/7

### What is cicumference in math?

A circumference is the distance around a circle. To find a circle's circumference you need to follow the formula: d*pi The d stands for diameter and pi is 3.14. You need to mulitply the length of the diameter by pi for the circumference. Or, if the diameter isn't given, multiply the radius by 2 and then multiply that by pi.

### What do you need to be a PI in Alabama?

previous experience as a hooker

### Why do you need Pi?

So that you can find the circumference of a circle.