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

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

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

The area of a circle is determined 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 ...

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

There is only one formula for the area of a circle: A = π r<sup>2</sup> ... Find the area of a
circle with a diameter of 20 cm. Use the π ... BBC World Service - Figure it out ...

www.mathopenref.com/circlearea.html

... resize the circle. As the size of the circle changes, the area is recalculated. ...
Use the calculator on the right to calculate the properties of a circle. Enter any ...

www.mathopenref.com/segmentarea.html

Area of a circular segment and a formula to calculate it from the central angle and
... Definition: The number of square units it takes to fill a segment of a circle.