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Circles

- Anupama Roy

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What is a Circle?

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A circle is a closed shape made up of all points that are the same distance from a fixed point.

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  • The fixed point is called the centre.
  • All points on the circle are equally distant from the centre.

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Centre

The centre is the fixed point in the middle of a circle.

It is usually represented by the letter O.

  • Example: If O is the middle point of a circle, then O is the centre.

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Radius

A radius is a line segment joining the centre to any point on the circle.

All radii of a circle are equal.

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Diameter

A diameter is a line segment that passes through the centre and joins two points on the circle.

It is the longest chord of a circle.

  • Diameter = 2 × Radius

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Chord

A chord is a line segment joining any two points on the circle.

It does not have to pass through the centre.

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Arc

An arc is a part of the circumference of a circle.

It is a curved portion between two points on the circle.

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In a Glimpse

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Fun Time

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Click the below QR to test your knowledge through a wonderful game !!!

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Quiz

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  1. What is the fixed point in the middle of a circle called?

�A) Radius�B) Diameter�C) Centre�D) Arc

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For video class

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https://youtu.be/NTRhOU8JHtw?feature=shared

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https://youtu.be/viM7a4IUp9Y?feature=shared

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To know more

Click here:-

Parts of a circle