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### Pi - Wikipedia

The symbol used by mathematicians to represent the ratio of a circle's circumference to its diameter is the lowercase Greek letter π, sometimes spelled out as pi. In English, πis pronounced as "pie"(/paɪ/PY).

https://en.wikipedia.org/wiki/Pi

### One Million Digits of Pi On One Page!- [Plus Guides And ... - Pi Day

The first 10 digits of pi (π) are 3.1415926535 The first million digits of pi (π) are below. Why not calculate the circumference of a circle using pi here. Or simply learn about pi here. Maximize the fun you can have this Pi Day by checking out our Pi Day Merch. Pi Day Expert Quiz!

https://www.piday.org/million/

### pi | Definition, Symbol, Number, & Facts | Britannica

pi, in mathematics, the ratio of the circumference of a circle to its diameter. The symbol π was devised by British mathematician William Jones in 1706 to represent the ratio and was later popularized by Swiss mathematician Leonhard Euler.

https://www.britannica.com/science/pi-mathematics

### What is Pi? | Pi Day

Pi (often represented by the lower-case Greek letter π), one of the most well-known mathematical constants, is the ratio of a circle’s circumference to its diameter. For any circle, the distance around the edge is a little more than three times the distance across. Pi Day Expert Quiz!

### Pi - Math is Fun

Pi Pi ( π) Draw a circle with a diameter (all the way across the circle) of 1 Then the circumference (all the way around the circle) is 3.14159265... a number known as Pi Pi (pronounced like "pie") is often written using the greek symbol π The definition of π is: The Circumference divided by the Diameter of a Circle.

https://www.mathsisfun.com/numbers/pi.html

### Pi Network - Pi Blockchain, Community & Developer Platform

Too many of us are left out of the cryptocurrency revolution. Pi makes crypto mining easy Breakthrough tech allows you to mine Pi on your phone without draining your battery. Decentralized Secure, Immutable, non-counterfeitable and interoperable digital money. Mobile First Works on your mobile phone and does not drain your battery.

https://minepi.com/

### Pi Definition & Meaning - Merriam-Webster

pi: [noun] the 16th letter of the Greek alphabet — see Alphabet Table.

https://www.merriam-webster.com/dictionary/pi

### 100,000 Digits of Pi

100,000 Digits of Pi 3.141592653589793238462643383279502884197169399375105820974944592307816406286 ...

http://www.geom.uiuc.edu/~huberty/math5337/groupe/digits.html

### What is Perfusion Index (PI) - AmperorDirect

Perfusion Index or PI is the ratio of the pulsatile blood flow to the non-pulsatile static blood flow in a patient's peripheral tissue, such as finger tip, toe, or ear lobe. Perfusion index is an indication of the pulse strength at the sensor site. The PI's values range from 0.02% …

https://www.amperordirect.com/pc/help-pulse-oximeter/z-what-is-pi.html

### BPC-PI Education

คณะสาธารณสุขศาสตร์และสหเวชศาสตร์. วิชาเรียนทั้งหมด

http://bpc.pi.ac.th/

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