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More Math Worksheets

More Printable Math Worksheets
7th Grade Math

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 area of a circle.

There are two sets of radius from area of circle worksheets

- Radius from area of circles (inches, ft, yard)
- Radius from area of circles (mm, cm)

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

A = πr^{2}

Solve for the radius (r):

r = √(A/π)

Where:

r is the radius of the circle.

A is the area of the circle.

π (pi) is a mathematical constant approximately equal to 3.14159…

Example:

Find the radius of a circle with a area of 113.04 units^{2}. Use 3.14 for π.

r = √(113.04/π) = 6 units

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

Click on the following worksheet to get a printable pdf document.

Scroll down the page for more **Radius from area of circle Worksheets**.

**Printable**

(Answers on the second page.)

Radius from area of circle Worksheet #1 (inches, feet, yard)

Radius from area 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

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