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

Area of a circle is presented in this interactive lesson from Math Goodies. ... or
incorrect. To start over, click CLEAR. Use Pi = 3.14 to calculate your answers.

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 ...

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 ... How to Calculate the Area ...

www.calculateme.com/cArea/AreaOfCircle.htm

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

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 use this
formula to find the area of a circle when given the diameter.

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

If you have the diameter of a circle, you can use it to find the area of that circle. ...
Did you know that you can figure out the formula for the area of a circle by first ...

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

To calculate the area of a circle using the value of pi is what this lesson will teach
you.

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

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

www.calcunation.com/calculator/circle-area.php

With this circle calculator you can find the area of a circle to help with your
geometry problems.

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

The following area of a circle calculator will help you find the area of any circle
when the radius is given. Just enter the value of the radius and hit calculate
button ...