Calculating the Area of a Circle

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<h3>Calculating the Area of a Circle</h3>

A circle is a two-dimensional object, which means that area is measured in units squared, such as square inches or square centimeters. To find the area of the circle, you only need to know the radius. The radius is the distance from the center of the circle to any point on the circle. Since all points on a circle are equidistant, it doesn’t matter which point on the circle you use.

Step 1

Measure the radius of the circle.



Step 2

Multiply the radius by the radius. For example, if you have a 18 inch radius, you would multiply 18 inches by 18 inches to get 324 square inches.

Step 3

Multiply the step 2 result by 3.1415, an approximation of pi, to find the circular area. Finishing the example, you would multiply 324 square inches by 3.1415 to get 1,017.846 square inches as the circular area.

Dave Pennells

By Dave Pennells

Dave Pennells, MS, has contributed his expertise as a career consultant and training specialist across various fields for over 15 years. At City University of Seattle, he offers personal career counseling and conducts workshops focused on practical job search techniques, resume creation, and interview skills. With a Master of Science in Counseling, Pennells specializes in career consulting, conducting career assessments, guiding career transitions, and providing outplacement services. Her professional experience spans multiple sectors, including banking, retail, airlines, non-profit organizations, and the aerospace industry. Additionally, since 2001, he has been actively involved with the Career Development Association of Australia.