Question 1: Today is Pi Day! Pi is the ratio of a circle’s circumference to its …
A Diameter
B Radius
C Area
Pi (3.14159…) is a mathematical constant used in many areas of mathematics and physics. It is the ratio of a circle’s circumference to its diameter, and it can be used to find the area of a circle or the volume of a sphere, as well as in advanced mathematics such as vector calculus.
Correct Answer: Diameter
Question 2: What kind of number is pi?
A Irrational
B Complex
C Rational
Pi, or π, cannot be written as a fraction, which means it is an irrational number. Its decimal representation goes on forever, never repeating. Mathematicians have calculated 202 trillion digits of pi so far, although, for most calculations, just 15 decimal places are sufficient!
Correct Answer: Irrational
Question 3: What alphabet does the letter π come from?
A Cyrillic
B Armenian
C Greek
The Greek letter π was originally used in mathematics to denote half the perimeter of a circle. It wasn’t until the 18th century that Welsh mathematician William Jones used the letter to represent the number pi. The letter π was chosen as an abbreviation of the Greek word ‘περιϕέρεια,’ meaning circumference or periphery.
Correct Answer: Greek