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meerkat18
The correct answer is B. Radius

In geometry, radius is needed to define a circle. It is described as the length of the line segment from the center to its perimeter. So the correct answer would be radius. It couldn't be the other choices which are point, line, and ray. I hope this helped you.  
ajeigbeibraheem

The point is an undefined term that can be used to define a circle.

What is a circle?

A circle is a two-dimensional enclosed shape wherein the set of all points in the plane is equal from a particular point known as the center.

Each point on the line is the same length away from the center. The distance from the center to the edge of the circle is called the radius.

Therefore, we can conclude that the point is an undefined term that can be used to define a circle because it assumes a circular shape.

Learn more about circle here:

https://brainly.com/question/26594685

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