In particular, after a quick refresher of circle basics, we’re going to figure out why the equation for the circumference of a circle that we all learned in school works, and we’re also going ...

I am Pi, the ratio of the circumference of a circle to its diameter. Picking up the phone here at the Smithsonian, I set out to find out more about Pi and how it is represented in the national ...

The radius can be used to calculate a circle's diameter, area and circumference. Likewise, ... As an example, if the area is measured in square inches, the radius will be given in inches.