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## Area of a 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 ...

## Area of a Circle - Math Goodies

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

Area of a circle is presented in this interactive lesson from Math Goodies.

## Area of a circle | Area | Geometry foundations | High school ...

Find the area of a circle given its radius, diameter, or circumference.

## Area of a Circle - Math is Fun

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":.

## 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.

Nov 8, 2009 ... Area of a circle and how it relates to radius and diameter.

## Area enclosed by a circle - Math Open Reference

www.mathopenref.com/circlearea.html

A circle is actually a line, one that connects back to itself making a loop. Imagine the circle to be a loop of string. The string itself has no area, but the space inside  ...

Apr 23, 2008 ... For a complete lesson on area of a circle, go to http://www.MathHelp.com - 1000+ online math lessons featuring a personal math teacher inside ...
Jun 29, 2015 ... This is a math video on how to find the area of a circle. In this video, children will learn how to use the formula for finding the area of a circle.

## Math Video - Area of a Circle - Math Playground

www.mathplayground.com/mv_area_circles.html

Math video teaches students how to find the area of a circle.

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

### Area of a circle | Geometry foundations | Khan Academy

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 Do You Find the Area of a Circle if You Know the Diameter ...

www.virtualnerd.com

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.

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

www.wikihow.com

How to Calculate the Area of a Circle. Follow these steps to find the area of a circle. You will also learn how to find the area of a sector, which is a slice of a circle, ...