The applications of circumference in everyday life are truly endless! One example, though, is determining how large of a tire someone needs for a bike or for a car. Another example would be finding how much wood is in a tree: with a very, very old tree, it would be pretty difficult to measure the diameter of the tree’s base; but it’d be straightforward to wrap a rope around the base and measure the circumference. Then, you could use this circumference measurement and ‘reverse-engineer’ the circumference equation to determine the tree’s diameter. With this measurement (and the height of the tree), we could find the volume of wood within this tree. Again, the list of examples could go on and on forever, so keep an eye out for other ways that you use circumference throughout your life!