Pi Day is an annual celebration of the mathematical constant π (pi).Pi Day is observed on March 14 (3/14 in the month/day format) since 3, 1, and 4 are the first three significant digits of π. Pi Day - Wikipedia
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 Day – Celebrate Mathematics on March 14th
Welcome to the Pi Day Challenge! The 2018 Pi Day Challenge is live - start solving the new puzzles today! New this year: solve puzzles from last year's challenge! Pi Day Challenge
A Brief History of π Pi has been known for almost 4000 years—but even if we calculated the number of seconds in those 4000 years and calculated pi to that number of places, we would still only be approximating its actual value. Pi Day: History of Pi | Exploratorium
This Doodle's Reach. This day in history Pi Day - Google
Fundamentals Name. 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, and derived from the first letter of the Greek word perimetros, meaning circumference. Pi - Wikipedia
Let the Wolfram Language generate your own personal piece of Pi. Enter your birthday or any other date to see how many digits it takes to get there. Find Your Pi Day
March 14 is Pi Day 2018 — pi, not pie — and Google is marking the 30th anniversary of the math-inspired holiday with a special Doodle Today Is Pi Day 2018. Here's What You Need to Know | Time
Welcome to the first and best place on the Web for teachers who want to find or share ideas for Pi Day activities, learning, and entertainment. TeachPi.org
Explore this collection of links to ideas and activities that will help you plan an unforgettable Pi Day (March 14) celebration. Plan a Pi Day Party (March 14) | Education World
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