# Keyword Analysis & Research: ratios and pi

## Keyword Research: People who searched ratios and pi also searched

What is the Pi is equal to the ratio of?

By definition, pi is the ratio of the circumference of a circle to its diameter. In other words, pi equals the circumference divided by the diameter (π = c/d). Conversely, the circumference of a circle is equal to pi times the diameter (c = πd). No matter how large or small a circle is, pi will always work out to be the same number.

What is the fraction formula for calculating pi?

The circumference of a circle is found with the formula C= π*d = 2*π*r. Thus pi equals a circle's circumference divided by its diameter. Plug your numbers into a calculator: the result should be roughly 3.14. ... Then, plug your number, which we'll call x, into this formula to calculate pi: x * sin(180 / x).

What is the actual number for Pi?

Pi is a real number, as all numbers that exist on a number line are real. Real numbers include all rational and irrational numbers; pi is defined as an irrational number. There are several categories that refer to types of numbers. Numbers that aren't real numbers include imaginary and complex numbers.