The formula for finding the area of a circle is A=(pi)R^2.

R is the radius of the circle.

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 a constant, approximately equal to 3.14159, which is equal to the
r...

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

Area of a circle is presented in this interactive lesson from Math Goodies. ... In the
last lesson, we learned that the formula for circumference of a circle is: C ...

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.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.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.khanacademy.org/math/basic-geo/basic-geo-area-and-perimeter/area-circumference-circle/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.wikihow.com/Calculate-the-Area-of-a-Circle

You will also learn how to find the area of a sector, which is a slice of a circle,
similar in shape to a slice of pie or ... The formula for finding the area of a circle is

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.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. ... Area of a Circle. The formula for the area of a circle is: A = pi × r<sup>2</sup>