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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 | Area and circumference of circles | Khan Academy

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

The area of a circle is pi times the radius squared (A = π r²). Learn how to use this formula to find the area of a circle when given the diameter.

## How to Calculate the Area of a Circle (with Examples) - wikiHow

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

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

## 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

Note: 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.

## 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.

## Circle Calculator - Calculate Area, Diameter, Circumference, and ...

www.easycalculation.com/area/circle.php

Circle Calculator. A circle is the set of all points in a plane at a fixed distance, called the radius, from a given point, the centre. Here you can calculate the area,  ...

## 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.

## BBC - GCSE Bitesize: Area of a circle

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

Find the area of a circle with a diameter of 20 cm. Use the π button on your calculator, and give the answer correct to 1 dp. image: circle, diameter 20cm.

www.ask.com/youtube?q=Calculate Area of a Circle&v=ghSBNOt-b-U
Jul 26, 2012 ... Area of a circle, step by step, example. For more videos on finding the area of a circle, visit http://MathMeeting.com.
www.ask.com/youtube?q=Calculate Area of a Circle&v=aZi1rgsZs4s
Sep 7, 2012 ... This tutorial shows how to find the area of a circle, given a diameter or a ... Math Tip: Calculate Area, Diameter and Circumference of a Circle ...
Answer
Calculate the Area of a Circle
Enter the radius:
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### Area of a Circle - Math is Fun

www.mathsisfun.com

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

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 ...

### Calculate the Area of a Circle - CalculateMe.com

www.calculateme.com

This calculator will calculate the area of a circle given its radius.