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.
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.
Six Methods:Calculate Area ExamplesSample CalculatorArea of the Circle
Finding the Area of a SectorSpecial circlesMeasuring the Diameter of Round
Area of a circle, formula for area explained with examples, pictures, interactive
examples and quiz.
Circle Calculator. A circle is the set of all points in a plane at a fixed distance,
called the radius, from a given point, the centre. Here you can calculate the area,
Given the radius, use this area of a circle calculator to find the area for any circle.
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.
Find the area of a circle with a diameter of 20 cm. Use the π button on your
calculator, and give the answer correct to 1 dp. image: circle, diameter 20cm.
Calculate the area and circumference of a circle. ... For help with using this
calculator, see the shape area help page. Return to the Shape Area section ...
This free online geometry calculator will take one known circle measurement (
area, circumference, diameter, or radius) and calculate the other three. Plus,