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Shapes: Circle

Document Reference: TN201002023 - Rev: 4.3 - Last Update: 18-09-2017 13:27 GMT - Downloaded: 26-Mar-2019 13:38 GMT

The edge of a circle is perfectly round, composed with a set of points that are all the same distance from the centre of the circle. A totally flat disc is an example of a circle.

A circle is a shape with equal distances from the centre to any point of the edge (circumference).

Circle Area

Area of a Circle

Formula

Area (A)=π×radius squared
A=π r2

 

Edge (Circumference) of a Circle

Circle

Formula

Edge=2 × π × radius
Edge=2 π r

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