# Circumference of a Circle Worksheets

There are six sets of circle worksheets:

Examples, solutions, videos, and worksheets to help grade 7 and grade 8 students learn how to find the circumference of a circle given its radius or diameter.

### How to find the circumference of a circle?

There are two sets of circumference of circle worksheets

• Circumferences (inches, ft, yard)
• Circumferences (mm, cm)

If you are given the radius of a circle, you can use the following formula to find the circumference of a circle:

C = 2πr

Where:

• C is the circumference of the circle.
• π (pi) is a mathematical constant approximately equal to 3.14159…
• r is the radius of the circle.

Example:
Find the circumference of a circle with a radius of 6 units. Use 3.14 for π.
C = 2πr = 2(3.14)(6) = 37.68 units

Given the diameter
If you know the diameter (which is twice the radius), you can also use the formula:

C = πd

Where:

• C is the circumference of the circle.
• π (pi) is the mathematical constant approximately equal to 3.14159…
• d is the diameter of the circle.

Example:
Find the circumference of a circle with a diameter of 8 units. Use 3.14 for π.
C = πd = (3.14)(8) = 37.68 = 25.12 units.

Have a look at this video if you need to review how to the circumference of a circle.

Click on the following worksheet to get a printable pdf document.
Scroll down the page for more Circumference Worksheets.

### More Circumference Worksheets

Printable
Circumference Worksheet #1 (inches, feet, yard)
Circumference Worksheet #2 (mm, cm)

More Printable Worksheets

Try the free Mathway calculator and problem solver below to practice various math topics. Try the given examples, or type in your own problem and check your answer with the step-by-step explanations.