What do we call the distance around a circle?

The distance around a circle is known as the circumference. To calculate it, you can use the formula \( C = 2\pi r \), where \( r \) is the radius of the circle, or \( C = \pi d \), where \( d \) is the diameter. Fun fact: If you measure the circumference of any circle and divide it by its diameter, you’ll always get a number approximately equal to 3.14, known as pi (\( \pi \))! If you ever find yourself needing to measure the circumference of a circular object, like a pizza or a hula hoop, you can easily do so using a string! Just wrap the string around the object, mark where it overlaps, and then measure that string with a ruler. It’s a practical way to bring geometry into your snack time or playtime!