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Question

Define the radius of a circle.


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Solution

The radius of a circle is the length of the line from the centre to any point on its edge.

It can also be defined as, the distance from the centre of the circle to any point on the circle is called the radius. It is denoted by r or R.

With respect to area and circumference, we can write the formula for the radius as:

R=C2π.

Also, R=D2.


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