Definition of Circle

What is the definition of circle?

A circle is defined as the locus of a point which moves in a plane such its distance from a fixed point in that plane is always constant.

For example: If a point P moves on a plane in such a manner that its distance from a fixed point C (say) on the plane is always the same then the locus of the moving point P is called a Circle. The fixed point C is called the Centre of the circle and the constant distance CP is called the Radius of the circle.

 The Circle

11 and 12 Grade Math 

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