Circumference of a Circle Worksheets

There are six sets of circle worksheets:

• Circumference Worksheets
  
• Area of Circle Worksheets
  
• Area & Circumference Worksheets
  
• Find Radius from Circumference
  
• Find Radius from Area
  
• Find Area from Circumference or vice versa
  

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)

Given the radius
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.

• How to Calculate 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
(Answers on the second page.)
Circumference Worksheet #1 (inches, feet, yard)
Circumference Worksheet #2 (mm, cm)

Online
Circumference of Circle
Area of Circle
Area & Circumference of Circle

Circle Problems: Circumference, Area
Circle Word Problems 1
Circle Word Problems 2

Area of shaded regions that include circles
Area of figures that include circles
Area of figures that include circles

Arc Length & Area of Sector (Degrees)
Arc Length & Area of Sector (Radians)
Convert between Radians and Degrees

Related Lessons & Worksheets

Circumference of a Circle

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.

We welcome your feedback, comments and questions about this site or page. Please submit your feedback or enquiries via our Feedback page.