Pi day

What Greek letter represents Pi?

A large pizza has a radius of 40 cm. If you cut it into 8 even slices, what is the area of one slice?

If we double the radius of a circle, how much does the area change in percentage?

What is the record of writing memorized π digits?

What is the world record of the largest human formation of the symbol π?

For approximately how many years π has been known?

Which mathematician was the first one to calculate π?

What is the meaning of cos(π/2)?

A circular garden has an area of 78.5m square meters. What is its radius (Use π = 3.14)?

What ancient civilization is credited for using fraction 256/81 as an approximation of π?

Why is π important in astronomy?

Which ancient text contains one of the earliest references of π approximation?

If a wheel rotates 50 times and has diameter of 2 meters, how far does it travel?

How does π relate to trigonometry?

What kind of polygon did Archimedes used to approximate π?

What kind of number is π?

Is it possible to calculate π using raindrops?

Which famous scientist was born on π day?

π is finite number

Which mathematician was obsessed with π and worked on calculating its digits for 25 years?