WHAT IS PI?
PI DAY FACTS
CIRCLE UP
DIGITS, DIGITS, DIGITS
PI IN REAL LIFE
100
This Greek letter represents the ratio of a circle's circumference to its diameter.
100
Pi Day is celebrated on this date.
What is March 14?
100
The distance from the center of a circle to it's edge.
What is the radius?
100
The first digit of pi after the decimal.
What is 1?
100
Pi is used when working with anything shaped like this.
What is a circle?
200
Pi is approximately equal to this number.
What is 3.14?
200
This date format matches the first three digits of pi.
What is 3/14?
200
The distance across a circle through its center.
What is the diameter?
200
The first three digits of pi.
What is 3.14?
200
Wheels, pipes, and conveyor rollers rely on this shape.
What is a cylinder or circle?
300
Pi is classified as this type of number because it never ends or repeats.
What is an irrational number?
300
This famous scientist was born on Pi Day
Who is Albert Einstein?
300
The distance around the outside of a circle.
What is the circumference?
300
True or false: Pi eventually ends.
What is false?
300
Engineers use pi when calculating this for circular objects.
What is area of circumference?
400
Pi has been calculated to more than this many digits worldwide.
What is trillions of digits?
400
This dessert is traditionally eaten on Pi Day.
What is pie?
400
If the radius of a circle doubles, the area does this.
What is quadruples?
400
This is what we call someone who memorizes many digits of pi.
What is a pi memorization champion?
(Accept: pi enthusiast)
400
This career regularly uses pi when designing machines and structures.
What is engineering?
(Accept: architecture, physics, manufacturing)
500
Pi is named after this Greek word meaning "perimeter."
What is perimetros?
500
Pi Day was officially recognized by the U.S House of Representatives in this year.
What is 2009?
500
If the diameter of a circle is 10 units, this is the radius used in circle formulas.
What is 5 units?
500
The world record holder memorized more than this many digits of pi.
What is over 70,000 digits?
500
Pi helps calculate volume for this 3D shape.
What is a sphere or cylinder?