Your question implies that it could be the radius, diameter or even the chord of a circle in which the diameter is the largest chord of a circle.
A circle has all of it's points the same distance from the center. For example, if you put a dot on a given point on the circumference, or outline of a circle, all the points have the same distance from the circle. This only works if you put a point on the outline or circumference of the circle.
the center of the circleThat point is called the "center" of the circle.
"Circle". That "same distance" is the radius of the circle, and that "given point" is the center of the circle.
circle, but the given end point is called the center of a circle : )
circleA circle
The points are all the same distance from the center of the circle. The distance between the center and any point is the radius of the circle.
A circle has all of it's points the same distance from the center. For example, if you put a dot on a given point on the circumference, or outline of a circle, all the points have the same distance from the circle. This only works if you put a point on the outline or circumference of the circle.
The center.
A circle
The centre of a circle is equal distance from all points of its circumference
This is the center of the circle. From the center of the circle, all the points on the circle are equally distant.
the center of the circleThat point is called the "center" of the circle.
"Circle". That "same distance" is the radius of the circle, and that "given point" is the center of the circle.
That's called the center
Circle
circle
That is a circle.