### Overview:

#### Pi Day was recently celebrated worldwide to recognize the mathematical constant, Pi.

**About Pi Day:**

**International Day of Mathematics**, or Pi Day, is celebrated on**March 14 every year**to recognize the**mathematical constant, Pi.**- The day is celebrated by mathematics enthusiasts and educators worldwide to recognize and appreciate the significance of mathematics in our lives.
**Why March 14?**- The
**approximate value of Pi is 3.14.** - The date, when
**written in the format of month/day (3/14)**,**matches the first three digits**of the mathematical constant.

- The
**History:**- The
**first Pi Day**was celebrated**in 1988 by physicist Larry Shaw**at the San Francisco Exploratorium. **In 2009**, the**United States House of Representatives designated March 14 as Pi Day.****UNESCO marked Pi Day as the ‘International Day of Mathematics'**during its general conference**in 2019.**- Mathematician and physicist Albert Einstein, known for the "General Theory Of Relativity," was born on Pi Day in 1879.

- The

### What is Pi (π)?

- Pi is a mathematical constant that
**represents the ratio of the circumference of a circle to its diameter.** - It is an
**infinitely long, irrational number**, and its exact value cannot be known. - Pi is
**roughly equal to 3.14 or 22/7.** **History:**- Pi has been
**known for nearly 4,000 years**and was**discovered by the ancient Babylonians.** - One of the
**first calculations**of pi was carried out**by Greek mathematician Archimedes of Syracuse**(287 B.C. to 212 B.C.) - It also has a
**symbol, ‘π.’**The symbol π was**devised by British mathematician William Jones in 1706.**

- Pi has been
**Applications**: It is used in a wide variety of mathematical and scientific**calculations, including geometry, trigonometry, calculus, and more.**

### Q1) What is an irrational number?

An irrational number is any real number that cannot be expressed as the quotient of two integers—that is, p/q, where p and q are both integers. Irrational numbers such as π can be expressed as an infinite decimal expansion with no regularly repeating digit or group of digits. Together the irrational and rational numbers form the real numbers.

**Source:** __Pi Day 2023: History And Significance Of This Mathematical Constant__