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Area of a Circle - Math Goodies

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

is the radius. Let's look at some examples involving the area of a circle. In each of the three examples below, we will use Pi = 3.14 in our calculations.

Area of a Circle - Math is Fun

www.mathsisfun.com/geometry/circle-area.html

Area of a Circle. Calculator Enter the radius, diameter, circumference or area of a Circle to find the other three. The calculations are done "live":.

Circle Calculator - Calculator Soup

www.calculatorsoup.com/calculators/geometry-plane/circle.php

Calculate the area, circumference and radius of circles. Given any 1 known variable of a circle, calculate the other 2 unknowns. Circle formulas and geometric ...

Area of a circle | Geometry foundations | Khan Academy

www.khanacademy.org/math/geometry/hs-geo-foundations/hs-geo-area/v/area-of-a-circle

The area of a circle is pi times the radius squared (A = π r²). Learn how to ... We can get a calculator to figure out what this will be in decimal form. So, we have 64  ...

How do you calculate the square footage of a circle? | Reference.com

www.reference.com/math/calculate-square-footage-circle-4ff067474032a974

... by the formula: A = π r2. You can easily calculate the area of a circle in under a minute. All you need is a calculator, a circle to measure and a tool with...

Area of circle, formula and illustrated lesson: how to calculate the ...

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

Area of a circle, formula for area explained with examples, pictures, interactive examples and quiz.

Area of a circle calculator - Basic mathematics

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

Given the radius, use this area of a circle calculator to find the area for any circle.

How Do You Find the Area of a Circle if You Know the Radius ...

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

If you know the radius of a circle, you can use it to find the area of that circle. Just plug that value into the formula for the area of a circle and solve. Watch this ...

Area of Sectors and Segments of Circles - Regents Exam Prep Center

www.regentsprep.org/regents/math/geometry/gp16/circlesectors.htm

Let's review what we know about the area of circles and sectors. Area (circle). Area of sectors of circle (Sectors are similar to "pizza pie slices" of a circle.) Semi-  ...

Determine the Area of a Circle - Smart Conversion

www.smartconversion.com/unit_calculation/Area_of_a_Circle.aspx

Click here to choose anothe area calculator. The area of a circle can be determined by using the following formula: where d is the diameter of the circle, which is ...

Answer
Calculate the Area of a Circle
Enter the radius:
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How to Calculate the Area of a Circle (with Examples) - wikiHow

www.wikihow.com

Six Methods:Calculate Area ExamplesSample CalculatorArea of the Circle Finding the Area of a SectorSpecial circlesMeasuring the Diameter of Round Physical ...

Calculate the Area of a Circle - CalculateMe.com

www.calculateme.com

This calculator will calculate the area of a circle given its radius, using the famous formula area = pi x r squared.

Online Conversion - Area of a Circle

www.onlineconversion.com

Calculate the area and circumference of a circle. ... For help with using this calculator, see the shape area help page. Return to the Shape Area section ...