Definitions & Formulas
Pi History
Pi Puns and Jokes
Calculations
Pi(e)-pourri
100

Pi

What is the ratio of the circumference of a circle to the diameter of the circle?

100

Theoretical physicist whose birthday is on the same date as Pi Day

Who is Albert Einstein? (born March 14, 1879)

100

This is why you should never start talking to Pi at a party

What is because it just goes on and on forever...

100

If the diameter of a circle is 4, this is the radius

What is 2?

100

This is Oregon's official state pie

What is marionberry pie?

200

A number that can not be accurately written as a simple ratio and whose decimals go on forever

What is an irrational number?

200

The person credited with first calculating pi, around 250 BC

Who is Archimedes of Syracuse? (He calculated the first 3 digits)

200

What you get if you divide the circumference of a jack-o-lantern by its diameter

What is pumpkin pi(e)?

200

Rounded to two decimal places, the circumference of a circle if the diameter is 1

What is 3.14?

200

"I prefer pi" is this type of phrase

What is a palindrome

300

The formula for the circumference of a circle

What is C = 2*(pi)*radius? Or C = (pi)*diameter

300

First is Alpha. Second is Beta. Third is Gamma. Pi comes at this point in the Greek alphabet

What is 16th?

300

What you get when you divide the circumference of the sun by its diameter

What is Pi in the sky?

300

The number of digits in Pi that represent whole numbers

What is one?  (The 3 in 3.14...)

300

On The Simpsons, the type of pie that lures Homer into a trap

What is floor pie?

400

This is the formula for the area of a circle

What is A = (pi) * r2?

400

In 1706, Welsh mathetmatician William Jones was the first person to do this

What is use the Greek letter pi as a symbol for the ratio of the Circumference to the diameter? (though Leonhard Euler is the one who popularized its use)

400

This is why Pi failed their driver's test

What is because they didn't know when to stop

400

For a circle with a radius of 10, the area of that circle, rounded to the nearest whole number

What is 314?

400

Another date to celebrate Pi Day--this would be the 314th day of the year

What is November 10? (or November 9 in leap years)

500

The surface area of a sphere with radius r

What is 4 π r?

500

The year or the person who first celebrated Pi Day

What is 1988? (or Who is Larry Shaw?)

500

What you get when a bunch of sheep stand around in a circle

What is shepherd's pie?

500

The circumference of a circle with diameter of pi

What is pi squared? (Or 9.86960440109 ....)

500

Famous TV character who once used Pi to destroy a disembodied evil alien consciousness taking over a computer 

Who is Spock? (in the episode "Wolf in the Fold")

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