How to Calculate the Circumference of a Circle

In the previous post, we have learned about the basic terminologies about circles. We continue this series by understanding the meaning of circumference of a circle. The circumference of a circle is basically the distance around the circle itself. If you want to find the circumference of a can, for example, you can get a measuring tape and wrap around it.

The animation below shows, the meaning of circumference. As we can see, the circle with diameter 1 has circumference \pi or approximately 3.14.

Note: If you want to know where \pi came from, read Calculating the Value of Pi.

Example 1

What is the perimeter of a circle with diameter 1 unit?  » Read more

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