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A circle is one of the geometrical shapes which has no corners or edges.
![1_1.png](https://resources.cdn.yaclass.in/c83794fd-f0fb-4a97-a817-a66827bcb556/11w300.png)
Parts of the circle:
Circumference: The distance once around the circle.
![3_1.png](https://resources.cdn.yaclass.in/9bcd512d-b46d-4c6c-accb-aa3fcb0bbda5/31w300.png)
Circular arc: A part of the circumference of a circle .
![18.png](https://resources.cdn.yaclass.in/9b2ae325-8813-42be-bb51-82fec7974cc6/18w300.png)
Sector: The plane surface that is enclosed between two radii (\(r\)) and the circular arc of a circle .
![17.png](https://resources.cdn.yaclass.in/8fc46e5d-234f-4ade-a996-2d131277e570/17w300.png)
Chord: A line segment joins any two-point \(A\) and \(B\).
![10_1.png](https://resources.cdn.yaclass.in/cc837899-5d49-463b-a6ab-58a29adbe09f/101w300.png)
Diameter: A chord \(A\) and \(B\) passing through the centre of a circle \(O\). It also knowns as the longest chord.
![9_1.png](https://resources.cdn.yaclass.in/4a8e1eb9-c324-460d-b034-985c687fb0e9/91w300.png)
Radius: A distance from the centre \(O\) to the circumference.
![8.png](https://resources.cdn.yaclass.in/4ba33369-a299-42c1-aa90-6701d57cb0dd/8w300.png)
Segment: A chord divide the circle into two parts. Each part is termed as segments. In this, the smaller arc is known as a minor segment, and the larger arc is known as a major segment.
![12.png](https://resources.cdn.yaclass.in/cb2c2565-18de-4257-9a1b-00fe70be0f53/12w500.png)
Concentric circles: A circle has the same centre but different radii.
![11_1.png](https://resources.cdn.yaclass.in/6e668ab4-2261-499a-8d8d-f680fb40a09d/111w300.png)