Find Radius from Circumference 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 radius from the circumference of a circle.

How to find the radius from circumference of a circle?

There are two sets of radius from circumference of circle worksheets

• Radius from circumference of circles (inches, ft, yard)
• Radius from circumference of circles (mm, cm)

To find the radius of a circle given its circumference, you can rearrange the formula for the circumference:

C = 2πr

Solve for the radius (r):

r = C/(2π)

Where:

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

Example:
Find the radius of a circle with a circumference of 50.24 units. Use 3.14 for π.
r = 50.24/(2 · 3.14) = 8 units

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

• Finding radius of circle given circumference

Click on the following worksheet to get a printable pdf document.
Scroll down the page for more Radius from circumference of circle Worksheets.

 

More Radius from circumference of circle Worksheets

Printable
(Answers on the second page.)
Radius from circumference of circle Worksheet #1 (inches, feet, yard)
Radius from circumference of circle 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

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