So you have a circle. What is the area of that circle? Surely everyone remembers that the area of a circle is: Where Pi (π ... the area density (mass per unit area) for the paper is fairly ...

But now let's try this a new way. Let’s see how close we can get to pi by drawing a circle. Here's how this will work. You draw a circle. From that circle, you can determine both the ...

The circumference of a circle = \(\pi d\) or \(2\pi r\). Look at the sector of the circle shown below. To calculate the length of the arc, we need to know what fraction of the circle is shown.