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Pi Meanings
Pi Day
Pi Formulas
Pi Humor
Pi Trivia
100
The definition of pi
What is the ratio of a circle’s circumference to its diameter?
100
Pi Day is celebrated on this date.
What is March 14? (3.14) ?
100
The formula for area of a circle
What is A=πr^2?
100
This is what you get when you divide the circumference of a jack-o-lantern by its diameter.
What is pumpkin pi?
100
The value of pi fits into this classification of numbers.
What is irrational?
200

An approximate value of pi, correct to five decimal places

What is 3.14159 ?

200
This famous mathematician’s birthday is on the same date as Pi Day.
Who is Albert Einstein?
200

The formula for circumference of a circle

What is C = 2πr or C = πd?

200

What you call a snake that is 3.14 feet long?

What is  a pi-thon?

200

One of two ancient countries in which a value for pi was probably first used to calculate the area of a circle

What is Babylon or Egypt? (probably as early as 2000 or 3000 BC)


300
An approximate value of pi, in fractional form
What is 22/7?
300
The best time of day to celebrate Pi Day, according to the third, fourth, and fifth digits following the decimal
What is 1:59?
300

The formula for volume of a cylinder

What is V = πr^2h ?

300

This is what you get when you divide the circumference of the sun by its diameter.

What is pi in the sky?

300

This scientist popularized the symbol for pi in 1737.

Who is Leonhard Euler?

400
∏ is a letter from the alphabet of this language
What is Greek ?
400

The year pi day became an official national holiday

What is 2009 ?

400

The formula for surface area of a cylinder

What is S = 2πrh + 2πr2h?

400

This is what you get when you divide the circumference of a bowl of ice cream by its diameter.

What is pi a’ la mode?

400

In this television series, a character foiled the evil computer by commanding it to "compute to the last digit the value of pi."

What is Star Trek?

500

The number of radians in a circle?

What is 2𝝅  ?

500

The earliest known date that Pi Day was celebrated in the USA.

What is March 14, 1988?

500
The formula for volume of a cone
What is V = 1/3πr^2h?
500

This is why pi failed its driving test.

What because it didn't know when to stop.

500

The person most commonly credited with being the first to accurately calculate the estimated value of pi.

Who is Archimedes?