What is Pi?

What is Pi?

Note:

Some numbers are just so cool that they get their own tutorial. Take the irrational number pi. This number is simply a ratio, but people have been working for years to find more and more digits of pi. Check out this tutorial to learn about pi!

Keywords:

  • Circle
  • Pi
  • Definition
  • Diameter
  • Radius
  • Circumference
  • Area
  • Ratio
  • Area of circle
  • Circumference of a circle
  • Irrational
  • Irrational number

Background Tutorials

  • Estimation and Rounding

      • How Do You Round a Decimal to a Given Place Value?How Do You Round a Decimal to a Given Place Value?

      How Do You Round a Decimal to a Given Place Value?

      Sometimes, decimals are so long that you need a way to estimate the value of the decimal. Other times, you may only need a certain amount of exactness to get your answer. This is where rounding decimals to a chosen place can be very helpful! Watch this tutorial to learn how to round a decimal to a chosen place.

  • Ratio Definitions

      • What's a Ratio?What's a Ratio?

      What's a Ratio?

      Ratios are everywhere! The scale on a map or blueprint is a ratio. Ingredients sometimes need to be mixed using ratios such as the ratio of water to cement mix when making cement. Watch this tutorial to learn about ratios. Then think of some ratios you've encountered before!

  • Real Number Definitions

      • What's an Irrational Number?What's an Irrational Number?

      What's an Irrational Number?

      Is an irrational number just a way to describe a number that's lost its mind? Not really. :) An irrational number is simply a number that cannot be written as a fraction. Check out the definition, learn an important property of these special numbers, and take a look at some examples of irrational numbers.

  • Circle Definitions

      • What is a Circle?What is a Circle?

      What is a Circle?

      Circles are a fundamental part of math! In this tutorial, you'll be introduced to circles and see the different parts of a circle such as the diameter, radius, and chord. Check out this tutorial to learn about circles!

Further Exploration