Pi Basics
The constant ratio of a circle's circumference to this distance across its center.
What is the diameter?
Celebrated by eating round desserts, Pi Day falls on this specific calendar date.
What is March 14th?
Multiplying Pi by the radius squared (Pi * r²) gives you this measurement of a circle.
What is the area?
In this hit 2012 survival drama film based on a book, a boy stranded on a lifeboat shares his name with the mathematical constant.
What is Life of Pi?
To two decimal places, this is the standard value of Pi.
What is 3.14?
This genius physicist, famous for the theory of relativity, was born on Pi Day in 1879.
Who is Albert Einstein?
Multiplying 2 * Pi * radius (2 * Pi * r) gives you this measurement of a circle.
What is the circumference?
In a classic episode of Star Trek, Spock defeats an evil alien computer by commanding it to compute this final digit.
What is the last digit of Pi?
This common fraction is often used as a close approximation for Pi.
What is 22/7?
This ancient Greek mathematician from Syracuse first rigorously calculated Pi using polygons.
Who is Archimedes?
Pi is used to find the volume of this 3D shape, calculated as (4/3) * Pi * r³.
What is a sphere?
This tech giant, famous for its search engine, once used mathematical equations involving Pi for its initial public offering (IPO) financial goals.
What is Google?
Because Pi's decimals go on forever without repeating, it belongs to this class of numbers.
What is an irrational number?
In 1897, this U.S. state almost passed a bill legally changing the value of Pi to 3.2.
What is Indiana?
Pi isn't just irrational; it's also called this type of number because it isn't the root of any algebraic equation.
What is transcendental?
This critically acclaimed 1998 psychological thriller film directed by Darren Aronofsky focuses on a mathematician obsessed with finding patterns in Pi.
What is Pi ?
Pi is this number letter of the Greek alphabet.
What is the 16th?
This 11-letter word is the official term for the hobby of memorizing and reciting digits of Pi.
What is piphilology?
Named after a Swiss mathematician, this "most beautiful identity" connects e, i, and Pi to equal -1.
What is Euler's Identity?
This massive multi-national tech company once used the mathematical constant Pi in its 2019 legal fight against a copycat logo, claiming their brand was "as distinct as Pi."
What is Raspberry Pi?