en.wikipedia.org/wiki/Area_of_a_circle

In geometry, the area enclosed by a circle of radius r is πr<sup>2</sup>. Here the Greek letter
π represents ...... The calculations Archimedes used to approximate the area
num...

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.

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":.

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 ...

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.

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.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 ...

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

Note: If you have the diameter 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.

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.