Pi Day Jeopardy

Do the Math

100

This is the circumference of a circle with a diameter of ten inches.      C=2πr

What is 31.4 inches

200

This is the circumference of a circle with a radius of four centimeters     C=2πr 

What is 25.12 centimeters

300

This is the diameter of a circle with a circumference of 28.26 ft.     C=2*π*r           d = 2*r

What is 9 ft.

400

This is the area of a circle with a diameter of four inches                A = π * r ²

What is 12.56 square inches

500

This is the area of a circle with a radius of five centimeters    A = π * r ²

What is 78.5 square centimeters

Pi Facts / Definitions

100

Pi is the ratio of a circle's circumference to this measurement.

What is the diameter

200

This is a number that cannot be expressed as a fraction of two integers

What is an irrational number

300

Pi got its name from the Greek word for this

What is perimeter

400

He is credited with determining a remarkably accurate approximation of pi in earliest times

Who is Archimedes of Syracuse

500

This the connection between Albert Einstein and Pi Day

What is a birthday on March 14

Pi Formulas

100

This is the formula to find the circumference of a circle

What is Pi times the diameter

200

This is the formula for finding the area of a circle

What is radius time radius times pi

300

Given the circumference, this is the formula to find the diameter

What is circumference divided by pi

400

Given the circumference, this is the formula to find the radius

What is circumference divided by pi divided by two

500

Given the area of a circle, this is the formula to find the radius

What is the square root of the area divided by pi

Pi Word Problems

100

Calculate the circumference of a circle with a radius of 4 cm.    C= 2πr

What is 16.4 cm 

200

Calculate the area of a circle with a diameter of 14 cm.

What is 154 cm²

300

A pizza has a circumference of 36 inches, what is its diameter? 

What is 12 inches

400

A circle has a radius of 23 cm. What is the best estimate for the circumference of the circle? C=2* π*r 

What is 144.44 cm 

500

A circular track has a diameter of 24 yards. If a runner completes one lap in 30 seconds, how fast is she running? (in yards per second).  C = = π* d

What is 0.8 yards per second