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Area of a circle - Wikipedia

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 and circumference of circles | Geometry | 7th ...

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.

Area of a circle | Area | Geometry foundations ... - Khan Academy

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

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

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.

Area of a Circle - AAA Math

www.aaamath.com/exp612x2.htm

An interactive math lesson to teach the finding the area of a circle.

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.

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

IXL - Radius, diameter, circumference, and area of a circle (5th ...

Fun math practice! Improve your skills with free problems in 'Radius, diameter, circumference, and area of a circle' and thousands of other practice lessons.

BBC - GCSE Bitesize: Area of a circle

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

A secondary school revision resource for GCSE Maths about higher level shapes and circles.

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 | Area | 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 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, ...

Area of a Circle - Math is Fun

www.mathsisfun.com

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":.