Circle

# Circle

• Circle
• Summary
• What’s Next?

In the first segment of the chapter Circles, we will revise a few concepts about circles.

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## What is a Circle?

A set of points equidistant from a given point forming a closed curve is called a Circle.

• Consider two points O and A on a plane.
• Join points O and A to form segment OA. Now mark all the points around point O, such that each one of them is at the same distance as OA. It is important to note that all the points away from Point O should lie on just one plane.
• Joining all the points forms a closed curve, which is a circle.

A

Formation of a circle

Point O is called the centre of the circle.

Every segment formed by joining the centre and any point on the circle is the radius of the circle.

Summary

 Circle A set of points equidistant from a given point forming a closed curve Radius of the Circle Segment formed by joining the centre and any point on the circle

## Related content

 Regions of a Circle Circumference of a Circle Chords of a Circle

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