Mathematicians
About Pi
Formulas
Math Problems
Radians
100

This famous mathematician's brithday is on pi day.

Albert Einstein

100

This is a common fraction used to approxiamte pi.

22/7

100

The formula for circumference of a circle

C = 2πr or C = πd

100

What is the area of a circle with a radius of 14.

196π

100

How manys radians are in a circle?

2π 

200

This mathematician, who discovered calculus, used an infinite series to approximate pi.

Isaac Newton

200

Pi is this type of number.

An Irrational Number.

200

The formula for area of a circle

A=πr^2

200

If the area of a circle is 49π then what is the diameter?

14

200

Convert 180° to radians.

π

300

This ancient mathematician used polygons t approximate the value of π 

Archimedes 

300

The definition of pi.

The ratio of a circle's circumference to it's diameter.

300

The formula for volume of a cylinder

V = πr^2h

300

What is the area of a circle with a diameter of 22

121π

300

Evalute sin(π/2).

1

400

This mathematician popularized the use of the pi symbol.

Leonard Euler

400

These are the first six digits of pi

3.14159

400

The formula for volume of a sphere

V = 4/3πr^3 

400

If the circumference of a circle is 16π then what is the area.

64π

400

Convert 135° to radians.

3π/4

500

This was the first to use the symbol "π "

William Jones

500

Pi is the ___ letter of the Greek alphabet.

16th

500

The formula for volume of a cone

V = 1/3πr^2h

500

If a cylinder has a volume of 360π and a height of 10, what is the circumference of the circular base?

12π

500

Evaluate cos(7π/3)

1/2