What is a segment joining the center of a circle to a point of a circle?

Answer 1

That particular segment is the radius of the circle, which is half of the diameter.
The radius
The line segment (distance) from the center of a circle to any point on the diameter of the circle is called the radius.
radius which is half the diameter and the area of the circle is pi*radius squared.
A chord of a circle is a line segment that has its endpoints on the circumference of the circle.

If a line segment is drawn from the center of the circle to the circumference (or curve), it is called a radius.

If a chord passes through the center of the circle, its length is the diameter (width) of the circle.
Radius joins the center of the circle to any point on the circle and a chord cuts through the circle but does not pass through the center.
length of a line segment joining center and

any poit on a circle
This is the definition of the radius of the circle, which is equal to one-half the diameter of the circle
The radius of the circle, equal to one-half of its diameter, is any line that goes from the center of the circle to any point on the circle.
The distance between the center and the edge of a circle is called the radius.
The distance between the center and edge of a circle is called the radius.
Radius

The distance from the center of a circle to its outer edge is the Radius.
A line drawn between the center of a circle and the edge of the circle is called the radius.
Radius.

Diameter is the entire distance across the circle, and radius is from the center to the edge (so 2r=D).
Radius :d
Radius
The distance is known as the radius and is drawn in a straight line from the centre of the circle to the edge of the circle itself