History of π
The invention of this mathematical topic allowed for an infinite series to compute π to greater precision.
What is Calculus?
Pi Day is celebrated on this date because of the first three digits of π.
When is March 14th?
The first five digits of π after the decimal are these.
14159
This formula gives the circumference of a circle with radius r.
What is 2πr?
In radian measure, a full revolution around the unit circle is this value.
What is 2π?
This ancient civilization was the first to approximate π.
Who are the Babylonians?
This famous university releases their admissions decisions on Pi Day.
What is the Massachusetts Institute of Technology?
Because its digits go on forever without repetition, π is this type of number.
What is an irrational number?
This formula gives the area of a circle with radius r.
What is πr^2
On the unit circle, this ordered pair corresponds to an angle of 0.
This Greek mathematician approximated π by inscribing and circumscribing polygons around a circle.
Who is Archimedes?
Pi Day coincides with the birthday of this famous physicist.
Who is Albert Einstein?
This number is the 934,512th digit of π. This number also happens to be the value for x in the equation sin(3x-6)=cos(66).
What is 8?
This formula gives the surface area of a sphere with radius r.
What is 4πr^2?
This value is equivalent to cos(π/3).
What is 1/2?
This Swiss mathematician popularized the use of π later in the 18th century.
Who is Leonhard Euler?
Some especially greasy mathematicians celebrate Pi Day by setting their alarms for what time?
When is 1:59am?
This number is the Guiness world record for the most digits of π memorized, set by Rajveer Meena.
What is 70,000?
This formula gives the volume of a cone with radius r and height h.
What is (πhr^2)/3?
The exact value of tan(3π/4) is this.
What is -1?
This Indiana doctor claimed he had been "supernaturally taught" the exact value of π and believed it was exactly 3.2.
Who is Edwin Goodwin?
This was India's first talking film, released on Pi Day.
What is Alam Ara?
Who in the room knows the most digits of π? Raise your hand if you think you do and please recite them.
Congrats!
If an ellipse has semi-major axis a and semi-minor axis b, this formula gives its area.
What is πab?
For spaces whose rational homology in each degree has finite dimension, Sullivan classified all rational homotopy types in terms of simpler algebraic objects named this.
What is Sullivan Algebra?