Why is the ratio of the circumference of any circle to the diameter of that circle pi?

Question

I understand that it IS pi, but I don’t understand what “ratio of the circumference of any circle to the diameter” means.

In: 0

Answer 1

Let’s say you have a tape measure. If you wrap that tape measure around a circle and measure it, that’s the circumference. If you take the tape measure and measure the circle across, from one end to the other, that’s the diameter. No matter how big the circle is, if you divide the circumference by the diameter, you always get pi.