Scientific American presents Math Dude by Quick & Dirty Tips. Scientific American and Quick & Dirty Tips are both Macmillan companies. Throughout history, circles have symbolized many things: unity, ...

The circumference of a circle is the distance around the circle. It is another name for the perimeter of a circle. The circumference of a circle is calculated using the formula: \(\text{circumference} ...

The circumference of a circle is the distance around the circle. It is another name for the perimeter of a circle. The circumference of a circle is calculated using the formulae: \(\text{circumference ...

Look at the slices in the circle - each slice is "r," the radius, long on a side. Here is what we know before we start: The circumference of the circle is Pi times the diameter. And the diameter is 2 ...