# This Is How the Number 3.14 Got the Name 'Pi'

It's not hard to figure out why March 14 is celebrated annually as "Pi Day" by math fans: The date resembles the ratio of a circle’s circumference to its diameter — the number that begins 3.14, perhaps better known Pi ( π ), which the holiday's official website describes as an “irrational and transcendental number” whose decimals “continue infinitely without repetition or pattern." Ancient Greek mathematician Archimedes of Syracuse, who lived in the third century B.C. and is considered the greatest mathematician of the ancient world, is credited with doing the first calculation of pi. It was not until the 18th century — about two millennia after the significance of the number 3.14 was first calculated by Archimedes — that the name "pi" was first used to denote the number. British mathematician William Jones came up with the Greek letter and symbol for the figure in 1706, and it was popularized by Swiss mathematician Leonhard Euler, Catherine the Great's mathematician, a few decades later. and pi is about the perimeter of the circle." Pi Day as holiday for math whizzes to eat pie and dress up in pi-themed hats and costumes originated much later, about 30 years ago, at the Exploratorium, a science museum in San Francisco, where physicist Larry Shaw organized such a celebration.

# What is the Best Fractional Representation of Pi?

As Dave (@DaleV34) pointed out: there is no 31st of April (that would be 31/4/2011). Also, there is no 14th month to do 3/14. Also, it is odd that there is a group sort of evenly spread out between n = 200 and 500. I am going to do it. The graph is dumb, so I am not going to include it.

# Happy Pi Day: Do you know what that means?

Privacy Policy Terms of Service Ad Choices Public File Privacy Policy Terms of Service Ad Choices Public File Pi has been calculated to over one trillion digits beyond its decimal point. National Pi Day has become a day to celebrate numbers and math— and of course, to eat pizza pies and pie for dessert. Of those surveyed, one in five people said they have no idea what pi is. The survey also found that 55 percent of people asked plan to celebrate Pi Day 2017— most of them by eating pie. Others planned to post about it on social media, while 15 percent of those surveyed said they would walk or jog 3.14 miles in honor of the number.

# Pi Day

Pi Day is celebrated on March 14th (3/14) around the world. Pi (Greek letter “π”) is the symbol used in mathematics to represent a constant — the ratio of the circumference of a circle to its diameter — which is approximately 3.14159. Pi has been calculated to over one trillion digits beyond its decimal point. As an irrational and transcendental number, it will continue infinitely without repetition or pattern. While only a handful of digits are needed for typical calculations, Pi’s infinite nature makes it a fun challenge to memorize, and to computationally calculate more and more digits.

# Generating Clean Energy Is Easy as Pi for Exelon

Calculating the Size of a Wind Turbine: Blades on a wind turbine are sometimes up to 60 meters in length. This is the same phenomenon that lifts planes off the ground! The longer the blades are, the more wind the turbine can capture and turn into electricity. We use pi to calculate how much energy we’ll capture on any given wind farm. The shape draws air inside from the base of the tower to cool the water, causing it to evaporate.

# Pi Day is here again! Here's what you need to know

Pi is the ratio of the circumference of a circle to its diameter. NASA wants you to celebrate like a rocket scientist and issued a Pi in the Sky Challenge. But it also applies to pizza pies. If you plan on buying a pie instead of baking, Whole Foods is offering $3.14 off all large pies. Meanwhile, if you have kids and live in the Northeast — where you are likely snowbound — the Pinterest search for "Pi Day activities" is your best friend.

# Pi Day the NASA Way - Teachable Moments | NASA/JPL Edu

Pi Day, the informal holiday beloved by math enthusiasts – and even by the math averse – is almost here! The first known celebration occurred in 1988, and in 2009, the US House of Representatives passed a resolution designating March 14 as Pi Day and encouraging teachers and students to celebrate the day with activities that teach students about pi. "Craters become more elliptical if the projectile hits the surface at a lower angle, so I use pi to measure how round a crater is to see if it impacted at a low angle.” "We use pi every day commanding rovers on Mars," said Hallie Gengl, a rover planner for the Mars Exploration Rover Opportunity, "Everything from taking images, turning the wheels, driving around, operating the robotic arm, and even talking to Earth.” Bryana Henderson, who specializes in planetary ices, uses lasers to explode ice samples and study their composition. In the Pi Day challenge, students use pi to calculate that change in velocity.” In the challenge, students will also use pi to calculate how much sunlight is blocked by our solar system’s innermost planet as it passes between Earth and the sun. On March 16, the answers to all four problems and the steps needed to find those answers will be released in a companion infographic on the Pi Day challenge activity page.

# Circle the date! It's Pi Day today!

Simply enough, is the ratio of a circle's circumference to its diameter. As the above circle unrolls, and it's compared to a ruler laid on the ground, the end of the circle will not fall exactly on one of the marks on the ruler. If the computer or robot didn't overload in the process, it at least bought you some time to escape. Fortunately, the cosmos is forgiving enough that we don't need to know to the last digit in order to produce useful results. In 2016, we couldn't accomplish anything quite like that, but by calling it "rounded pi day" - as rounding off to four decimal places gives us 3.1416, or 3/14/16 on the calendar - we were able to celebrate all day long!