International Pi Day

International Pi Day

By Szabina Tóth

What is the first thing that comes to your mind related to π?

Fun facts

Quiz​

Multiple Choice

The symbol for Pi has been used in its mathematical sense for the past

• 100 years

• 250 years

• 314 years

• 500 years

Multiple Choice

Pi equals (approximately)

• 3,14159...

• 3,14314

• 3,1614

• 3,14152

Multiple Choice

Which of the following expressions is NOT used to refer to PI?

• Circular Constant

• Archimedes' Constant

• Einstein's Code

• Ludolph's Number

Multiple Choice

Pi is irrational. What does it mean?

• It is equal to the ratio of two integers.

• Its square root is imaginary.

• It was Ralph Waldo Emerson's favourite number.

• It can't be expressed as a quotient of integers.

Multiple Choice

Who gave the Greek letter Pi its current mathematical definition?

• William Jones

• Attila the Hun

• Albert Einstein

• Archimedes

Multiple Choice

What is the earliest known reference to Pi in history?

• Rosetta Stone (200BC)

• Egyptian papyrus scroll (1650 BC)

• The Bible

• Euclid's Elements (3rd century BC)

Multiple Choice

What is the formal "definition" of Pi?

• 3.1415926

• the radius of a circle

• the diameter of a circle the circumference of which is 1unit

• the ratio of a circle’s circumference to its diameter

Multiple Choice

How many decimal places of Pi are known today?

• 62,8 trillion

• 7 million

• 600 thousand

• 2,8 billion

Multiple Choice

The first known celebration of Pi Day was organized by Larry Shaw on the 14 March (3.14.)

• in 1988

• in 314

• in 2005

• in 1314

Multiple Choice

Pi is the .......................... letter in the Greek alphabet.

• 8th

• 11th

• 16th

• 18th

•2 pizzas of d=32 cm diameter, or

•1 pizza of d=45 cm diameter?​

​

•https://pizzaforte.hu/pizzak.php

Which one is at a better price?

Multiple Choice

Which one is at a better price?

• 2 smaller pizzas

• 1 bigger pizza

Calculations

​The area of a Margherita pizza:

​

Decide whether the following statements are TRUE or FALSE.​

Move to the right if the statement is true and to the left if it is false. Which city can you reach if you follow this logic?)​

true or false

1. Albert Einstein was born on March 14th​.

2. ​The sequence 123456 appears in the first million digits of Pi many times.

3.  The π symbol that we use in math to represent pi was first used by the Swiss mathematician, physicist, and astronomer Leonard Euler in the year 1737.

4. The fraction 22/7 is a well-used number for Pi.​

Fill in the Blank

Which city are you in?

true or false

1. Albert Einstein was born on March 14th​. T

2. ​The sequence 123456 appears in the first million digits of Pi many times. F

3.  The π symbol that we use in math to represent pi was first used by the Swiss mathematician, physicist, and astronomer Leonard Euler in the year 1737. T

4. The fraction 22/7 is a well-used number for Pi.​ T

​Tokyo

Find your birthday in π

https://www.piday.org/find-birthday-in-pi/?fbclid=IwAR13QrVknQUCFn-RWpFTjlJl7C0VVwkQ6aN71VLXFWkQir2aeBOE8f3QOMs​

Pi song

https://www.youtube.com/watch?v=wM-x3pUcdeo​