What Is Pi?

Because, you know this question will come up! I’d like to have these graphics to explain when it does!

Mostly True Stories of K. Renae P.

I Like Pi Screenshot via I Like Pi

What Is Pi (π)?

π = c/d

Pi (3.14) is the distance around a circle, or circumference, divided by its diameter. Pi is always the same number no matter the size of the circle.

Pi Unrolled

Why isn’t Pi rational?

Pi is an irrational number, which means that it is a real number with decimal that repeats forever. There is no exact value for the number since it repeats infinitely.

Test it!

If you would like to investigate π on your own, try this brief experiment from Scientific American.

  1. Using a compass, draw a circle.
  2. Take one piece of string and place it on top of the circle, exactly once around.
  3. Straighten out the string; its length is called the circumference of the circle.
  4. Measure the circumference with a ruler.
  5. Measure the diameter of the circle, which is the length from any point on the circle straight…

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2 responses to “What Is Pi?

  1. Jonathan 3.141592

    I can tell you what’s not pi: my blog. But pi is part of my username. 😉 And it’s a very good movie about a math guy becoming insane. Cool post. One of my favourit numbers.

    Liked by 1 person

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