Pi, a mathematical constant denoted by the Greek letter π, is the ratio of a circle's circumference C to its diameter d: π = C/d. The circumference of a circle is, in turn, equal to 2πr, where ...

Greek mathematician Archimedes is considered the first person to accurately approximate pi in 250 BCE. Welsh mathematician William Jones is credited with the first use of the symbol π (the Greek ...

For example, to write the formula for calculating the volume of a cylinder, you'd start by expanding the Greek letters dropdown to choose the pi symbol. Then, go to Math operations dropdown ...