Circle Pi Day

What does this symbol represent?

• a letter from the English alphabet

• a greek letter

• pie

• pi

What is pi used to find? 

• the perimeter of a square

• the area of a rectangle

• radius of a circle

• circumference of a circle

What is the "formal" definition of pi?

• 22/7

• 3.1415926

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

• the surface area of a sphere of diameter 22/7

What number is pi?

• 41

• 00

• 3.14

• 5.14

How is Pi defined?

• The ratio of the diameter of a circle to its circumference

• The ratio of the circumference of a circle to its diameter

• The ratio of the radius of a circle to its circumference

• The ratio of the circumference of a circle to its radius

What digits do we use for Pi?

• 31.4

• 3.14

• 314

What do you get when you divide the circumference of a Jack-o-Lantern by its diameter?

• Pumpkin

• Jack-o-Lantern

• Pumpkin Pi

• Pi in the Sky

Who did the first proof to find the number pi?

• Archimedes

• Pythagorus

• Socrates

• Boyle

Which fraction is a good approximation for pi?

• 22/3

• 22/9

• 22/7

• 22/5

Is pi irrational, rational, both, or neither?

• Both

• Irrational

• Rational

• Neither