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Mathematics Monster(#MM) Free Mathematics Lessons and Exercises
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Circle Geometry Widget

Learn about Circle Geometry

A circle is a shape containing a set of points that are all the same distance from its center. A circle has some important dimensions: the radius, the diameter and the circumference. It also has an area, which is the amount of space contained by a circle.

Interactive Widget

This widget allows you to find the radius, diameter, circumference and area of a circle.

Draw a circle by:


= 2 × radius

= 2 × π × radius

= π × radius2

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