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www.mathgoodies.com/lessons/vol2/circle_area.html

is the radius. Let's look at some examples involving the

www.khanacademy.org/math/basic-geo/basic-geo-area-perimeter/basic-geo-area-circumference/v/area-of-a-circle

The

www.wikihow.com/Calculate-the-Area-of-a-Circle

Six Methods:

www.mathwarehouse.com/geometry/circle/area-of-circle.php

www.easycalculation.com/area/circle.php

www.basic-mathematics.com/area-of-a-circle-calculator.html

Given the radius, use this

www.virtualnerd.com/pre-algebra/perimeter-area-volume/circles/circle-sector-area-examples/circle-area-from-radius

Note: If you know the radius

www.bbc.co.uk/schools/gcsebitesize/maths/geometry/circlesrev3.shtml

Find the

www.onlineconversion.com/shape_area_circle.htm

www.free-online-calculator-use.com/circle-calculator.html

This free online geometry

Answer

More Info

www.mathsisfun.com

www.calculatorsoup.com

www.calculateme.com

This