#### If you were run all the way around a circle the distance that you would travel is called the circumference. Any straight line that travels through the center of a circle and touches end to end of a circle is called the diameter. You might have heard of the famous symbol pi ( π )? π is used to define the ratio of the circumference of circle to its diameter. This just means that if you know the circumference and dimeter of a circle, you can divide the circumference by the diameter, and you will get a value that is pretty close to 3.14. Using π and understanding the relationship of this ratio we can tell a great deal about the measures of a circle include circumference, diameter, and radius. Using the form of math is how traffic circles are created and it is also how farmers tell how much grain their silo will hold for all the animals.

In this series of printable worksheets you will look to calculate the distance around a circle. You will use the standard formula two-pi-radius. We also introduce perimeter in this section. Try not to confuse the two measures. Circumference is very similar to perimeter because it is a measure of the length around a two-dimensional figure. The main difference is that circumference looks for distance across curved or arched segments. These worksheets explains how to find the circumference of a circle and the perimeter of any shape. Your students will use these sheets to learn how to calculate the circumference and perimeter of different figures (circles, squares, etc.).