All About Pi
What is the first digit of pi after the decimal?
1
What is the approximate value of pi?
3.14
What shape has no straight edges and no corners?
A circle
What is the most popular pie in America?
Apple pie
What famous scientist was born on Pi Day?
Albert Einstein
Pi is an example of what kind of number that goes on forever without repeating?
An irrational number
If a circle’s diameter is 10 cm, what is its radius?
5 cm
What do you call the distance from the center of a circle to its edge?
Radius
What pie is often eaten at Thanksgiving?
Pumpkin pie
What does the word “pi” mean in Greek?
Perimeter
What is Pi Day’s date every year?
March 14th (3/14)
What is the formula to find the circumference of a circle?
C=π×d or C=2πr
What is the name of the distance across a circle, passing through the center?
Diameter
What is the name of a popular pie filled with nuts and a sugary mixture?
Pecan pie
A pizza company offers a “Pi Day” discount on what date?
March 14th (3/14)
What is the symbol for pi?
The Greek letter π
A circle has a radius of 4 inches. What is its diameter?
8 inches
What is the area formula for a circle?
A=πr2
What fruit pie is made with yellow fruit and a lattice crust is often placed on top?
Peach pie
Pi is used in which field of study: biology, math, or history?
Math
State the first 14 digits of pi after the decimal
14159265358979
If a pizza has a diameter of 12 inches, what is its approximate circumference using 3.14 for π?
37.68 inches (C = 3.14 × 12)
What do you call a line segment that touches a circle at one point?
A tangent
What kind of pie is made with the juice of a green fruit, egg yolks, and sweetened condensed milk?
Key lime pie
What is the world record for most digits of pi memorized—over 50,000, 70,000, or 100,000?
Over 70,000