Pi Riddles
Circumference
Area
Radius and Diameter
Pi Puns
100

What does a mathematician need to fly his plane?

A Pi-lot's License

100

What is the formula to find the circumference of a circle?


 2pir or pid 

100

What is the formula for finding the area of a circle?

 pir^2 

100

Pi is the ratio of a circle's circumference to what measurement?

The diameter

100
This is the cutest pi there is
What is a "Cutie Pi-e"
200

Why shouldn't you eat too much pi?

You'll end up with a big circumference.

200

What is the circumference of a circle with a diameter of ten inches?

 31.4 inches

200

What is the area of a circle with a radius of five centimeters?

78.5 square centimeters

200

If you are given the area of a circle, this is the formula to find the radius?

 sqrt(A/pi) 

200
This is what you get when you divide a Jack-o-Lantern by its diameter.
What is Pumpkin Pi-e
300

Why should you never start talking to pi at a party?

It goes on forever

300

What is the circumference of a circle with a radius of four centimeters?

25.12 centimeters

300

What is the area of a circle with a radius of 7 feet?

153.86 square feet

300

What is the diameter of a circle with a circumference of 28.26 ft.?

9 ft

300

This is a mathematician's favorite pet.

pi-thon

400

What is wrong with the equation "pi r squared"?

pi are round. Cake is square.

400

What is the circumference of the High Roller ferris wheel in Las Vegas if it has a diameter of 520 ft.?

1632.8 feet

400

What is the area of a circle with a diameter of six inches

28.26 square inches

400

What is the radius of a circle with a circumference of 12.56 meters?

2 meters

400

This is what pi's husband said to her

Stop being so irrational

500

Who shares their birthday with Pi Day?

Albert Einstein

500

What is the circumference of a circular race track with a diameter of 1/2 mile?

1.57 miles

500

What is the area of a circle with a diameter of 13 centimeters?

132.665 square centimeters

500

What is the radius of a circle with an area of 530.66 square inches?

13 inches

500

This is the best way to visualize infinity

with a pi chart