The radius is the line from the center of a circle to its circumference.
The question is: Is A radius is an angle that connects to any point on the circle to the center of that circle? A Radius is a straight line coming from any point of the circle to the center of the circle. And remember that the Diameter is a straight line coming from any point of the circle and going straight through the center to the other side of the circle. The Radius is ALWAYS half of the Diameter; and, the Diameter is ALWAYS twice the Radius.
It is the circle's radius
It is the radius of the circle
the radius
any point on a circle and the circle's center