Circumference

Circumference is basically the distance around a circle. Imagine you have a circle toy that you can hold in your hand. Now, if you were to put a string around the outside of the circle, the length of that string would be the circumference.

Think of it like when you measure a bracelet around your wrist. The length of the bracelet all the way around your wrist is the circumference of your wrist.

The size of a circle's circumference depends on how big the circle is. So if you have a small circle, the distance around it will be shorter than a big circle.

If you want to know the exact circumference of a circle, you can use a formula (a fancy math rule). The formula says that the circumference of a circle is equal to the diameter (the distance across the circle) times pi (a special number that is about 3.14).

So, if you know the diameter of a circle, you can use the formula to find out its circumference. Or if you know the circumference, you can use the formula to figure out the diameter.